View and change CSS | Chrome DevTools

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role="presentation"> <a role="menuitem" lang="pl" >Polski</a> </li> <li role="presentation"> <a role="menuitem" lang="pt_br" >Português – Brasil</a> </li> <li role="presentation"> <a role="menuitem" lang="vi" >Tiếng Việt</a> </li> <li role="presentation"> <a role="menuitem" lang="tr" >Türkçe</a> </li> <li role="presentation"> <a role="menuitem" lang="ru" >Русский</a> </li> <li role="presentation"> <a role="menuitem" lang="he" >עברית</a> </li> <li role="presentation"> <a role="menuitem" lang="ar" >العربيّة</a> </li> <li role="presentation"> <a role="menuitem" lang="fa" >فارسی</a> </li> <li role="presentation"> <a role="menuitem" lang="hi" >हिंदी</a> </li> <li role="presentation"> <a role="menuitem" lang="bn" >বাংলা</a> </li> <li role="presentation"> <a role="menuitem" lang="th" >ภาษาไทย</a> </li> <li role="presentation"> <a role="menuitem" lang="zh_cn" >中文 – 简体</a> </li> <li role="presentation"> <a role="menuitem" lang="zh_tw" >中文 – 繁體</a> </li> <li role="presentation"> <a role="menuitem" lang="ja" >日本語</a> </li> <li role="presentation"> <a role="menuitem" lang="ko" >한국어</a> </li> </ul> </devsite-language-selector> <devsite-user enable-profiles id="devsite-user"> <span class="button devsite-top-button" aria-hidden="true" visually-hidden>Sign in</span> </devsite-user> </div> </div> </div> <div class="devsite-collapsible-section "> <div class="devsite-header-background"> <div class="devsite-product-id-row" > <div class="devsite-product-description-row"> <ul class="devsite-breadcrumb-list" > <li class="devsite-breadcrumb-item "> <a href="https://developer.chrome.com/docs/devtools" class="devsite-breadcrumb-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Lower Header" data-value="1" track-type="globalNav" track-name="breadcrumb" track-metadata-position="1" track-metadata-eventdetail="Chrome DevTools" > Chrome DevTools </a> </li> </ul> </div> </div> <div class="devsite-doc-set-nav-row"> <devsite-tabs class="lower-tabs"> <nav class="devsite-tabs-wrapper" aria-label="Lower tabs"> <tab > <a href="https://developer.chrome.com/docs/devtools" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - devtools" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: DevTools" track-name="devtools" > DevTools </a> </tab> <tab class="devsite-dropdown "> <a href="https://developer.chrome.com/docs/devtools/dom" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/dom" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - panels" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: Panels" track-name="panels" > Panels </a> <a href="#" role="button" aria-haspopup="true" aria-expanded="false" aria-label="Dropdown menu for Panels" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/dom" track-metadata-position="nav - panels" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: Panels" track-name="panels" class="devsite-tabs-dropdown-toggle devsite-icon devsite-icon-arrow-drop-down"></a> <div class="devsite-tabs-dropdown" aria-label="submenu" hidden> <div class="devsite-tabs-dropdown-content"> <div class="devsite-tabs-dropdown-column "> <ul class="devsite-tabs-dropdown-section "> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/elements" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/elements" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Elements </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/ai-assistance" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/ai-assistance" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> AI assistance </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/console" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/console" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Console </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/sources" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/sources" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Sources </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/network/overview" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/network/overview" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Network </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/performance/overview" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/performance/overview" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Performance </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/memory" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/memory" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Memory </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/application" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/application" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Application </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/recorder/overview" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/recorder/overview" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Recorder </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/rendering" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/rendering" track-metadata-position="nav - panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Rendering </div> </a> </li> </ul> </div> </div> </div> </tab> <tab class="devsite-dropdown devsite-active "> <a href="https://developer.chrome.com/docs/devtools/security" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/security" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - more panels" track-metadata-module="primary nav" aria-label="More panels, selected" data-category="Site-Wide Custom Events" data-label="Tab: More panels" track-name="more panels" > More panels </a> <a href="#" role="button" aria-haspopup="true" aria-expanded="false" aria-label="Dropdown menu for More panels" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/security" track-metadata-position="nav - more panels" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: More panels" track-name="more panels" class="devsite-tabs-dropdown-toggle devsite-icon devsite-icon-arrow-drop-down"></a> <div class="devsite-tabs-dropdown" aria-label="submenu" hidden> <div class="devsite-tabs-dropdown-content"> <div class="devsite-tabs-dropdown-column "> <ul class="devsite-tabs-dropdown-section "> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/autofill" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/autofill" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Autofill </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/css/animations" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/css/animations" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Animations </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/changes" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/changes" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Changes </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/coverage" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/coverage" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Coverage </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/developer-resources" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/developer-resources" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Developer resources </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/css-overview" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/css-overview" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> CSS overview </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/issues" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/issues" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Issues </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/layers" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/layers" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Layers </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/lighthouse" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/lighthouse" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Lighthouse </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/media-panel" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/media-panel" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Media </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/memory-inspector" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/memory-inspector" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Memory Inspector </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/device-mode/override-user-agent" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/device-mode/override-user-agent" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Network conditions </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/network-request-blocking" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/network-request-blocking" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Network request blocking </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/performance-monitor" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/performance-monitor" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Performance monitor </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/protocol-monitor" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/protocol-monitor" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Protocol monitor </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/quick-source" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/quick-source" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Quick source </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/security" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/security" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Security </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/sensors" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/sensors" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> Sensors </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/webaudio" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/webaudio" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> WebAudio </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/webauthn" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/webauthn" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> WebAuthn </div> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/docs/devtools/whats-new" track-type="nav" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/whats-new" track-metadata-position="nav - more panels" track-metadata-module="tertiary nav" tooltip > <div class="devsite-nav-item-title"> What's new </div> </a> </li> </ul> </div> </div> </div> </tab> <tab > <a href="https://developer.chrome.com/docs/devtools/settings" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/settings" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - settings" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: Settings" track-name="settings" > Settings </a> </tab> <tab > <a href="https://developer.chrome.com/docs/devtools/accessibility/reference" track-metadata-eventdetail="https://developer.chrome.com/docs/devtools/accessibility/reference" class="devsite-tabs-content gc-analytics-event " track-type="nav" track-metadata-position="nav - accessibility" track-metadata-module="primary nav" data-category="Site-Wide Custom Events" data-label="Tab: Accessibility" track-name="accessibility" > Accessibility </a> </tab> </nav> </devsite-tabs> </div> </div> </div> </div> </devsite-header> <devsite-book-nav scrollbars > <div class="devsite-book-nav-filter" > <span class="filter-list-icon material-icons" aria-hidden="true"></span> <input type="text" placeholder="Filter" aria-label="Type to filter" role="searchbox"> <span class="filter-clear-button hidden" data-title="Clear filter" aria-label="Clear filter" role="button" tabindex="0"></span> </div> <nav class="devsite-book-nav devsite-nav nocontent" aria-label="Side menu"> <div class="devsite-mobile-header"> <button type="button" id="devsite-close-nav" class="devsite-header-icon-button button-flat material-icons gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Close navigation" aria-label="Close navigation"> </button> <div class="devsite-product-name-wrapper"> <a href="/" class="devsite-site-logo-link gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Site logo" track-type="globalNav" track-name="chromeForDevelopers" track-metadata-position="nav" track-metadata-eventDetail="nav"> <picture> <source srcset="https://www.gstatic.com/devrel-devsite/prod/v870e399c64f7c43c99a3043db4b3a74327bb93d0914e84a0c3dba90bbfd67625/chrome/images/lockup-dark-theme.svg" media="(prefers-color-scheme: dark)" class="devsite-dark-theme" alt="Chrome for Developers"> <img src="https://www.gstatic.com/devrel-devsite/prod/v870e399c64f7c43c99a3043db4b3a74327bb93d0914e84a0c3dba90bbfd67625/chrome/images/lockup.svg" class="devsite-site-logo" alt="Chrome for Developers"> </picture> </a> <span class="devsite-product-name"> <ul class="devsite-breadcrumb-list" > <li class="devsite-breadcrumb-item "> </li> </ul> </span> </div> </div> <div class="devsite-book-nav-wrapper"> <div class="devsite-mobile-nav-top"> <ul class="devsite-nav-list"> <li class="devsite-nav-item"> <a href="/case-studies" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Get inspired" track-name="get inspired" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Get inspired" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Get inspired </span> </a> </li> <li class="devsite-nav-item"> <a href="/blog" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Blog" track-name="blog" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Blog" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Blog </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs" class="devsite-nav-title gc-analytics-event devsite-nav-active" data-category="Site-Wide Custom Events" data-label="Tab: Docs" track-name="docs" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Docs" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Docs </span> </a> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu "> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Docs" track-name="docs" > <span class="devsite-nav-text" tooltip menu="Docs"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="Docs"> </span> </span> </li> </ul> <ul class="devsite-nav-responsive-tabs"> <li class="devsite-nav-item"> <a href="/docs/devtools" class="devsite-nav-title gc-analytics-event devsite-nav-has-children " data-category="Site-Wide Custom Events" data-label="Tab: DevTools" track-name="devtools" data-category="Site-Wide Custom Events" data-label="Responsive Tab: DevTools" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > DevTools </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/dom" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: Panels" track-name="panels" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Panels" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Panels </span> </a> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu devsite-lower-tab-item"> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: Panels" track-name="panels" > <span class="devsite-nav-text" tooltip menu="Panels"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="Panels"> </span> </span> </li> </ul> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/security" class="devsite-nav-title gc-analytics-event devsite-nav-has-children devsite-nav-active" data-category="Site-Wide Custom Events" data-label="Tab: More panels" track-name="more panels" data-category="Site-Wide Custom Events" data-label="Responsive Tab: More panels" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip menu="_book"> More panels </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="_book"> </span> </a> <ul class="devsite-nav-responsive-tabs devsite-nav-has-menu devsite-lower-tab-item"> <li class="devsite-nav-item"> <span class="devsite-nav-title" tooltip data-category="Site-Wide Custom Events" data-label="Tab: More panels" track-name="more panels" > <span class="devsite-nav-text" tooltip menu="More panels"> More </span> <span class="devsite-nav-icon material-icons" data-icon="forward" menu="More panels"> </span> </span> </li> </ul> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/settings" class="devsite-nav-title gc-analytics-event devsite-nav-has-children " data-category="Site-Wide Custom Events" data-label="Tab: Settings" track-name="settings" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Settings" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Settings </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/accessibility/reference" class="devsite-nav-title gc-analytics-event devsite-nav-has-children " data-category="Site-Wide Custom Events" data-label="Tab: Accessibility" track-name="accessibility" data-category="Site-Wide Custom Events" data-label="Responsive Tab: Accessibility" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Accessibility </span> <span class="devsite-nav-icon material-icons" data-icon="forward" > </span> </a> </li> </ul> </li> <li class="devsite-nav-item"> <a href="/new" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Tab: New in Chrome" track-name="new in chrome" data-category="Site-Wide Custom Events" data-label="Responsive Tab: New in Chrome" track-type="globalNav" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > New in Chrome </span> </a> </li> </ul> </div> <div class="devsite-mobile-nav-bottom"> <ul class="devsite-nav-list" menu="_book"> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Get started</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/open" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/open" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/open" ><span class="devsite-nav-text" tooltip>Open Chrome DevTools</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/news" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/news" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/news" ><span class="devsite-nav-text" tooltip>What's new in DevTools</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/customize" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/customize" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/customize" ><span class="devsite-nav-text" tooltip>Customize DevTools</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/tips" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/tips" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/tips" ><span class="devsite-nav-text" tooltip>DevTools Tips</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Commands and shortcuts</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/command-menu" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/command-menu" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/command-menu" ><span class="devsite-nav-text" tooltip>Run commands in the Command Menu</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript/disable" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript/disable" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript/disable" ><span class="devsite-nav-text" tooltip>Disable JavaScript</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/shortcuts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/shortcuts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/shortcuts" ><span class="devsite-nav-text" tooltip>Keyboard shortcuts</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/device-mode" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/device-mode" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/device-mode" ><span class="devsite-nav-text" tooltip>Simulate mobile devices with Device Mode</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/search" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/search" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/search" ><span class="devsite-nav-text" tooltip>Find text across all loaded resources with Search</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Elements</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/elements" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/elements" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/elements" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>DOM</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/devtools/dom" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/dom" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/dom" ><span class="devsite-nav-text" tooltip>View and change the DOM</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/dom/properties" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/dom/properties" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/dom/properties" ><span class="devsite-nav-text" tooltip>View properties of DOM objects</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/elements/badges" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/elements/badges" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/elements/badges" ><span class="devsite-nav-text" tooltip>Badges references</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>CSS</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/devtools/css" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css" ><span class="devsite-nav-text" tooltip>View and change CSS</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/css/issues" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/issues" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/issues" ><span class="devsite-nav-text" tooltip>Find invalid, overridden, inactive, and other CSS</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/css/color" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/color" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/color" ><span class="devsite-nav-text" tooltip>Inspect and debug with the Color Picker</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/css/grid" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/grid" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/grid" ><span class="devsite-nav-text" tooltip>Inspect grid layouts</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/css/flexbox" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/flexbox" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/flexbox" ><span class="devsite-nav-text" tooltip>Inspect and debug flexbox layouts</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/css/container-queries" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/container-queries" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/container-queries" ><span class="devsite-nav-text" tooltip>Inspect and debug container queries</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/css/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/reference" ><span class="devsite-nav-text" tooltip>Feature reference</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>AI assistance</span> </div></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/docs/devtools/ai-assistance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/ai-assistance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/ai-assistance" ><span class="devsite-nav-text" tooltip>Overview</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/docs/devtools/ai-assistance/styling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/ai-assistance/styling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/ai-assistance/styling" ><span class="devsite-nav-text" tooltip>Styling</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/docs/devtools/ai-assistance/network" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/ai-assistance/network" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/ai-assistance/network" ><span class="devsite-nav-text" tooltip>Network</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/docs/devtools/ai-assistance/sources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/ai-assistance/sources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/ai-assistance/sources" ><span class="devsite-nav-text" tooltip>Sources</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-experimental"><a href="/docs/devtools/ai-assistance/performance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/ai-assistance/performance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/ai-assistance/performance" ><span class="devsite-nav-text" tooltip>Performance</span><span class="devsite-nav-icon material-icons" data-icon="experimental" data-title="Experimental!" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Console</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/console" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/understand-messages" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/understand-messages" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/understand-messages" ><span class="devsite-nav-text" tooltip>Understand errors and warnings with Console insights</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/log" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/log" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/log" ><span class="devsite-nav-text" tooltip>Log messages</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/javascript" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/javascript" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/javascript" ><span class="devsite-nav-text" tooltip>Run JavaScript</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/live-expressions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/live-expressions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/live-expressions" ><span class="devsite-nav-text" tooltip>Watch JavaScript in real-time</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/format-style" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/format-style" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/format-style" ><span class="devsite-nav-text" tooltip>Format and style messages</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/reference" ><span class="devsite-nav-text" tooltip>Feature reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/api" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/api" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/api" ><span class="devsite-nav-text" tooltip>API reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/console/utilities" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/console/utilities" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/console/utilities" ><span class="devsite-nav-text" tooltip>Utilities API reference</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Sources</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/sources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/sources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/sources" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript" ><span class="devsite-nav-text" tooltip>Debug JavaScript</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript/breakpoints" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript/breakpoints" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript/breakpoints" ><span class="devsite-nav-text" tooltip>Pause your code with breakpoints</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript/snippets" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript/snippets" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript/snippets" ><span class="devsite-nav-text" tooltip>Run snippets of JavaScript</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript/source-maps" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript/source-maps" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript/source-maps" ><span class="devsite-nav-text" tooltip>Debug original code instead of deployed with source maps</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/workspaces" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/workspaces" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/workspaces" ><span class="devsite-nav-text" tooltip>Edit and save files in a workspace</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/overrides" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/overrides" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/overrides" ><span class="devsite-nav-text" tooltip>Override web content and HTTP response headers locally</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript/reference" ><span class="devsite-nav-text" tooltip>JavaScript debugging reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/wasm" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/wasm" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/wasm" ><span class="devsite-nav-text" tooltip>Debug C/C++ WebAssembly</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Network</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/network/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/network/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/network/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/network" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/network" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/network" ><span class="devsite-nav-text" tooltip>Inspect network activity</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/network/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/network/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/network/reference" ><span class="devsite-nav-text" tooltip>Features reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/resources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/resources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/resources" ><span class="devsite-nav-text" tooltip>View page resources</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Performance</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance" ><span class="devsite-nav-text" tooltip>Analyze runtime performance</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance/reference" ><span class="devsite-nav-text" tooltip>Features reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance/timeline-reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance/timeline-reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance/timeline-reference" ><span class="devsite-nav-text" tooltip>Timeline event reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance/selector-stats" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance/selector-stats" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance/selector-stats" ><span class="devsite-nav-text" tooltip>Analyze CSS selector performance</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance/nodejs" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance/nodejs" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance/nodejs" ><span class="devsite-nav-text" tooltip>Profile Node.js performance</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance/extension" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance/extension" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance/extension" ><span class="devsite-nav-text" tooltip>Customize your performance data with extensibility API</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance-insights" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance-insights" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance-insights" ><span class="devsite-nav-text" tooltip>Get actionable insights on your website's performance</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Lighthouse</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/lighthouse" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/lighthouse" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/lighthouse" ><span class="devsite-nav-text" tooltip>Optimize web speed</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Memory</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/memory" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/memory" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/memory" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/memory-problems/memory-101" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/memory-problems/memory-101" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/memory-problems/memory-101" ><span class="devsite-nav-text" tooltip>Memory terminology</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/memory-problems" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/memory-problems" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/memory-problems" ><span class="devsite-nav-text" tooltip>Fix memory problems</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/memory-problems/heap-snapshots" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/memory-problems/heap-snapshots" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/memory-problems/heap-snapshots" ><span class="devsite-nav-text" tooltip>Record heap snapshots</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/memory-problems/allocation-profiler" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/memory-problems/allocation-profiler" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/memory-problems/allocation-profiler" ><span class="devsite-nav-text" tooltip>Allocation Profiler tool</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Application</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/application" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/application" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/application" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/progressive-web-apps" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/progressive-web-apps" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/progressive-web-apps" ><span class="devsite-nav-text" tooltip>Debug Progressive Web Apps</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>View and edit</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/devtools/storage/localstorage" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/storage/localstorage" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/storage/localstorage" ><span class="devsite-nav-text" tooltip>Local storage</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/storage/sessionstorage" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/storage/sessionstorage" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/storage/sessionstorage" ><span class="devsite-nav-text" tooltip>Session storage</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/storage/indexeddb" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/storage/indexeddb" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/storage/indexeddb" ><span class="devsite-nav-text" tooltip>IndexedDB data</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/storage/websql" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/storage/websql" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/storage/websql" ><span class="devsite-nav-text" tooltip>Web SQL data</span></a></li></ul></div></li> <li class="devsite-nav-item"><a href="/docs/devtools/application/cookies" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/application/cookies" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/application/cookies" ><span class="devsite-nav-text" tooltip>View, add, edit, and delete cookies</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/storage/cache" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/storage/cache" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/storage/cache" ><span class="devsite-nav-text" tooltip>View cache data</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/application/back-forward-cache" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/application/back-forward-cache" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/application/back-forward-cache" ><span class="devsite-nav-text" tooltip>Test back/forward caching</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/application/debugging-speculation-rules" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/application/debugging-speculation-rules" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/application/debugging-speculation-rules" ><span class="devsite-nav-text" tooltip>Debugging speculation rules</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/javascript/background-services" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/javascript/background-services" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/javascript/background-services" ><span class="devsite-nav-text" tooltip>Debug background services</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/application/frames" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/application/frames" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/application/frames" ><span class="devsite-nav-text" tooltip>View frame details</span></a></li> <li class="devsite-nav-item devsite-nav-deprecated"><a href="/docs/devtools/storage/applicationcache" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/storage/applicationcache" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/storage/applicationcache" ><span class="devsite-nav-text" tooltip>View Application Cache data</span><span class="devsite-nav-icon material-icons" data-icon="deprecated" data-title="Deprecated" aria-hidden="true"></span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Recorder</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/recorder/overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/recorder/overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/recorder/overview" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/recorder" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/recorder" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/recorder" ><span class="devsite-nav-text" tooltip>Record, replay, and measure user flows</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/recorder/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/recorder/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/recorder/reference" ><span class="devsite-nav-text" tooltip>Features reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/recorder/extensions" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/recorder/extensions" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/recorder/extensions" ><span class="devsite-nav-text" tooltip>Customize the Recorder with extensions</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Rendering</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/rendering" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/rendering" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/rendering" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/rendering/performance" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/rendering/performance" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/rendering/performance" ><span class="devsite-nav-text" tooltip>Discover issues with rendering performance</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/rendering/emulate-css" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/rendering/emulate-css" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/rendering/emulate-css" ><span class="devsite-nav-text" tooltip>Emulate CSS media features</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/rendering/apply-effects" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/rendering/apply-effects" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/rendering/apply-effects" ><span class="devsite-nav-text" tooltip>Apply rendering effects</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>More panels</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/autofill" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/autofill" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/autofill" ><span class="devsite-nav-text" tooltip>Inspect and debug saved addresses with the Autofill panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/security" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/security" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/security" ><span class="devsite-nav-text" tooltip>Understand security issues with the Security panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/sensors" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/sensors" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/sensors" ><span class="devsite-nav-text" tooltip>Emulate device sensors with the Sensors panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/webaudio" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/webaudio" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/webaudio" ><span class="devsite-nav-text" tooltip>View WebAudio API metrics with the WebAudio panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/webauthn" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/webauthn" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/webauthn" ><span class="devsite-nav-text" tooltip>Emulate authenticators with the WebAuthn panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/css/animations" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css/animations" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css/animations" ><span class="devsite-nav-text" tooltip>Inspect and modify animations with the Animations panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/changes" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/changes" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/changes" ><span class="devsite-nav-text" tooltip>Track changes to HTML, CSS, and JavaScript with the Changes panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/coverage" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/coverage" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/coverage" ><span class="devsite-nav-text" tooltip>Find and analyze unused code with the Coverage panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/developer-resources" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/developer-resources" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/developer-resources" ><span class="devsite-nav-text" tooltip>View and manually load source maps with the Developer Resources panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/css-overview" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/css-overview" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/css-overview" ><span class="devsite-nav-text" tooltip>Identify potential CSS improvements with the CSS Overview panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/issues" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/issues" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/issues" ><span class="devsite-nav-text" tooltip>Find and fix problems with the Issues panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/layers" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/layers" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/layers" ><span class="devsite-nav-text" tooltip>Analyze the layers of your website with the Layers panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/media-panel" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/media-panel" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/media-panel" ><span class="devsite-nav-text" tooltip>Debug media players with the Media panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/memory-inspector" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/memory-inspector" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/memory-inspector" ><span class="devsite-nav-text" tooltip>Inspect ArrayBuffer, TypedArray, DataView or Wasm memory with the Memory inspector panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/device-mode/override-user-agent" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/device-mode/override-user-agent" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/device-mode/override-user-agent" ><span class="devsite-nav-text" tooltip>Override the user agent string with the Network conditions panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/network-request-blocking" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/network-request-blocking" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/network-request-blocking" ><span class="devsite-nav-text" tooltip>Selectively block resources with the Network request blocking panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/performance-monitor" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/performance-monitor" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/performance-monitor" ><span class="devsite-nav-text" tooltip>Analyze runtime performance in real-time with the Performance monitor panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/protocol-monitor" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/protocol-monitor" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/protocol-monitor" ><span class="devsite-nav-text" tooltip>View and send CDP requests with the Protocol monitor panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/quick-source" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/quick-source" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/quick-source" ><span class="devsite-nav-text" tooltip>View source files while having access to other tools with the Quick source panel</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/whats-new" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/whats-new" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/whats-new" ><span class="devsite-nav-text" tooltip>What's new</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Remote debugging</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/remote-debugging" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/remote-debugging" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/remote-debugging" ><span class="devsite-nav-text" tooltip>Remote debug Android devices</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/remote-debugging/local-server" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/remote-debugging/local-server" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/remote-debugging/local-server" ><span class="devsite-nav-text" tooltip>Access local servers and Chrome instances with port forwarding</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/remote-debugging/webviews" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/remote-debugging/webviews" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/remote-debugging/webviews" ><span class="devsite-nav-text" tooltip>Remote debugging WebViews</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Accessibility</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/accessibility/reference" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/accessibility/reference" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/accessibility/reference" ><span class="devsite-nav-text" tooltip>Features reference</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/accessibility/contrast" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/accessibility/contrast" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/accessibility/contrast" ><span class="devsite-nav-text" tooltip>Contrast and readability</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/accessibility/focus" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/accessibility/focus" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/accessibility/focus" ><span class="devsite-nav-text" tooltip>Track elements focus</span></a></li> <li class="devsite-nav-item"><a href="/docs/devtools/accessibility/navigation" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/accessibility/navigation" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/accessibility/navigation" ><span class="devsite-nav-text" tooltip>Navigate DevTools with assistive technology</span></a></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Settings</span> </div></li> <li class="devsite-nav-item"><a href="/docs/devtools/settings" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings" ><span class="devsite-nav-text" tooltip>Overview</span></a></li> <li class="devsite-nav-item devsite-nav-expandable"><div class="devsite-expandable-nav"> <a class="devsite-nav-toggle" aria-hidden="true"></a><div class="devsite-nav-title devsite-nav-title-no-path" tabindex="0" role="button"> <span class="devsite-nav-text" tooltip>All settings</span> </div><ul class="devsite-nav-section"><li class="devsite-nav-item"><a href="/docs/devtools/settings/preferences" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/preferences" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/preferences" ><span class="devsite-nav-text" tooltip>Preferences</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/workspace" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/workspace" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/workspace" ><span class="devsite-nav-text" tooltip>Workspace</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/ai-innovations" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/ai-innovations" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/ai-innovations" ><span class="devsite-nav-text" tooltip>AI innovations</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/experiments" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/experiments" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/experiments" ><span class="devsite-nav-text" tooltip>Experiments</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/ignore-list" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/ignore-list" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/ignore-list" ><span class="devsite-nav-text" tooltip>Ignore list</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/devices" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/devices" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/devices" ><span class="devsite-nav-text" tooltip>Devices</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/throttling" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/throttling" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/throttling" ><span class="devsite-nav-text" tooltip>Throttling</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/locations" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/locations" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/locations" ><span class="devsite-nav-text" tooltip>Locations</span></a></li><li class="devsite-nav-item"><a href="/docs/devtools/settings/shortcuts" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /docs/devtools/settings/shortcuts" track-type="bookNav" track-name="click" track-metadata-eventdetail="/docs/devtools/settings/shortcuts" ><span class="devsite-nav-text" tooltip>Shortcuts</span></a></li></ul></div></li> <li class="devsite-nav-item devsite-nav-heading"><div class="devsite-nav-title devsite-nav-title-no-path"> <span class="devsite-nav-text" tooltip>Resources</span> </div></li> <li class="devsite-nav-item"><a href="/discover?category=engineeringblog" class="devsite-nav-title gc-analytics-event" data-category="Site-Wide Custom Events" data-label="Book nav link, pathname: /discover?category=engineeringblog" track-type="bookNav" track-name="click" track-metadata-eventdetail="/discover?category=engineeringblog" ><span class="devsite-nav-text" tooltip>Engineering blog</span></a></li> </ul> <ul class="devsite-nav-list" menu="Docs" aria-label="Side menu" hidden> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Build with Chrome </span> </span> </li> <li class="devsite-nav-item"> <a href="/docs/web-platform" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Web Platform" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Web Platform </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/capabilities" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Capabilities" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Capabilities </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/chromedriver" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: ChromeDriver" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > ChromeDriver </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/extensions" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Extensions" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Extensions </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/webstore" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Chrome Web Store" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Chrome Web Store </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/chromium" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Chromium" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Chromium </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/aurora" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Aurora" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Aurora </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/android" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Web on Android" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Web on Android </span> </a> </li> <li class="devsite-nav-item"> <a href="https://developer.chrome.com/origintrials/" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Origin trials" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Origin trials </span> </a> </li> <li class="devsite-nav-item"> <a href="/release-notes" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Release notes" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Release notes </span> </a> </li> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Productivity </span> </span> </li> <li class="devsite-nav-item"> <a href="/docs/devtools" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: DevTools" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > DevTools </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/lighthouse" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Lighthouse" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Lighthouse </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/crux" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Chrome UX Report" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Chrome UX Report </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/accessibility" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Accessibility" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Accessibility </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/workbox" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Workbox" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Workbox </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/puppeteer" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Puppeteer" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Puppeteer </span> </a> </li> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Experience </span> </span> </li> <li class="devsite-nav-item"> <a href="/docs/ai" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: AI" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > AI </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/performance" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Performance" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Performance </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/css-ui" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: CSS and UI" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > CSS and UI </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/identity" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Identity" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Identity </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/payments" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Payments" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Payments </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/privacy-security" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Privacy and security" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Privacy and security </span> </a> </li> <li class="devsite-nav-item devsite-nav-heading"> <span class="devsite-nav-title" tooltip > <span class="devsite-nav-text" tooltip > Resources </span> </span> </li> <li class="devsite-nav-item"> <a href="/docs" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: All documentation" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > All documentation </span> </a> </li> <li class="devsite-nav-item"> <a href="https://web.dev/baseline" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Baseline" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Baseline </span> </a> </li> <li class="devsite-nav-item"> <a href="https://web.dev" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: web.dev" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > web.dev </span> </a> </li> </ul> <ul class="devsite-nav-list" menu="Panels" aria-label="Side menu" hidden> <li class="devsite-nav-item"> <a href="/docs/devtools/elements" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Elements" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Elements </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/ai-assistance" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: AI assistance" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > AI assistance </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/console" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Console" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Console </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/sources" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Sources" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Sources </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/network/overview" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Network" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Network </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/performance/overview" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Performance" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Performance </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/memory" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Memory" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Memory </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/application" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Application" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Application </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/recorder/overview" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Recorder" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Recorder </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/rendering" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Rendering" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Rendering </span> </a> </li> </ul> <ul class="devsite-nav-list" menu="More panels" aria-label="Side menu" hidden> <li class="devsite-nav-item"> <a href="/docs/devtools/autofill" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Autofill" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Autofill </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/css/animations" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Animations" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Animations </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/changes" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" data-label="Responsive Tab: Changes" track-type="navMenu" track-metadata-eventDetail="globalMenu" track-metadata-position="nav"> <span class="devsite-nav-text" tooltip > Changes </span> </a> </li> <li class="devsite-nav-item"> <a href="/docs/devtools/coverage" class="devsite-nav-title gc-analytics-event " data-category="Site-Wide Custom Events" 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analytics-action-show="Callout Profile displayed" analytics-action-close="Callout Profile dismissed" analytics-label="Create Collection Callout" class="devsite-page-bookmark-tooltip nocontent" dismiss-button="true" id="devsite-collections-dropdown" dismiss-button-text="Dismiss" close-button-text="Got it"> <devsite-bookmark></devsite-bookmark> <span slot="popout-heading"> Stay organized with collections </span> <span slot="popout-contents"> Save and categorize content based on your preferences. </span> </devsite-feature-tooltip> <div class="devsite-page-title-meta"><devsite-view-release-notes></devsite-view-release-notes></div> <devsite-toc class="devsite-nav" depth="2" devsite-toc-embedded > </devsite-toc> <div class="devsite-article-body clearfix "> <p><style> .wd-authors { --avatar-size: 65px; display: flex; gap: 2em; } .wd-author { display: flex; flex-wrap: wrap; gap: 1em; line-height: calc(var(--avatar-size) / 2); } .wd-author img { border-radius: 50%; height: var(--avatar-size, 65px); width: var(--avatar-size, 65px); } .dcc-authors { --avatar-size: 65px; display: flex; gap: 2em; } .dcc-author { display: flex; flex-wrap: wrap; gap: 1em; line-height: calc(var(--avatar-size) / 2); } .dcc-author img { border-radius: 50%; height: var(--avatar-size, 65px); width: var(--avatar-size, 65px); } .dcc-author__links a { margin-inline-end: 6px; } .dcc-author__links a:last-of-type { margin-inline-end: 0; } </style> <div class="dcc-authors" translate="no"> <div class="dcc-author"> <img class="devsite-landing-row-item-icon" alt="Kayce Basques" src="https://web.dev/images/authors/kaycebasques.jpg" decoding="async" height="64" loading="lazy" width="64"> <div> <span> Kayce Basques </span> <div class="dcc-author__links"> <a href="https://twitter.com/kaycebasques" aria-label="Kayce Basques on X" rel="me"> <svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 300 271"> <title>X</title> <path fill="currentColor" d="m236 0h46l-101 115 118 156h-92.6l-72.5-94.8-83 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<div> <span> Sofia Emelianova </span> <div class="dcc-author__links"> <a href="https://github.com/sofiayem" aria-label="Sofia Emelianova on GitHub" rel="me"> <svg xmlns="http://www.w3.org/2000/svg" width="22" height="22" viewBox="0 0 32.6 31.8"> <title>GitHub</title> <path d="M16.3 0C7.3 0 0 7.3 0 16.3c0 7.2 4.7 13.3 11.1 15.5.8.1 1.1-.4 1.1-.8v-2.8c-4.5 1-5.5-2.2-5.5-2.2-.7-1.9-1.8-2.4-1.8-2.4-1.5-1 .1-1 .1-1 1.6.1 2.5 1.7 2.5 1.7 1.5 2.5 3.8 1.8 4.7 1.4.1-1.1.6-1.8 1-2.2-3.6-.4-7.4-1.8-7.4-8.1 0-1.8.6-3.2 1.7-4.4-.1-.3-.7-2 .2-4.2 0 0 1.4-.4 4.5 1.7 1.3-.4 2.7-.5 4.1-.5 1.4 0 2.8.2 4.1.5 3.1-2.1 4.5-1.7 4.5-1.7.9 2.2.3 3.9.2 4.3 1 1.1 1.7 2.6 1.7 4.4 0 6.3-3.8 7.6-7.4 8 .6.5 1.1 1.5 1.1 3V31c0 .4.3.9 1.1.8 6.5-2.2 11.1-8.3 11.1-15.5C32.6 7.3 25.3 0 16.3 0z" fill-rule="evenodd" clip-rule="evenodd" fill="currentColor" /> </svg></a> </div> </div> </div> </div></p> <style> .devtools-css-check { input { color: #00f; &:invalid { background: #c00; color: #fff; } } input:not(:invalid) + span::after { content: 'Correct!'; padding-left: 0.5ch; } } .aloha { border: 1px dashed #f00; display: inline-block; padding: 1em; &.hover { &:hover { background: #6393f0; } } } @keyframes rainbow { 0% { background: violet; } 25% { background: orange; } 50% { background: yellow; } 75% { background: blue; } 100% { background: violet; } } .color_me { animation: rainbow 10s linear infinite; background: yellow; } </style> <p>Complete these interactive tutorials to learn the basics of viewing and changing a page's CSS using Chrome DevTools.</p> <h2 id="view" data-text="View an element's CSS" tabindex="-1">View an element's CSS</h2> <ol> <li><p>Right-click the <code translate="no" dir="ltr">Inspect me!</code> text below and select <strong>Inspect</strong>. The <strong>Elements</strong> panel of DevTools opens.</p> <p class="aloha" data-message="wackadoo!">Inspect me!</p></li> <li><p>Observe the <code translate="no" dir="ltr">Inspect me!</code> element highlighted blue in the <strong>DOM Tree</strong>.</p> <p><img src="/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c.png" alt="Highlighted element." width="800" height="526" srcset="https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/highlighted-element-8f4f3524bfa5c_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p></li> <li><p>In the <strong>DOM Tree</strong>, find the value of the <code translate="no" dir="ltr">data-message</code> attribute for the <code translate="no" dir="ltr">Inspect me!</code> element.</p></li> <li><p>Enter the attribute's value in the text box below.</p> <div class="devtools-css-check"> <input type="text" required pattern="wackadoo!" /> <span></span> </div></li> <li><p>In the <strong>Elements</strong> > <strong>Styles</strong> tab, find the <code translate="no" dir="ltr">aloha</code> class rule.</p> <p>The <strong>Styles</strong> tab lists the CSS rules being applied to whatever element is selected in the <strong>DOM Tree</strong>, which should still be the <code translate="no" dir="ltr">Inspect me!</code> element.</p></li> <li><p>The <code translate="no" dir="ltr">aloha</code> class is declaring a value for <code translate="no" dir="ltr">padding</code>. Enter this value and its unit without spaces in the text box below.</p> <div class="devtools-css-check"> <input type="text" required pattern="1em" /> <span></span> </div></li> </ol> <p>If you'd like to dock your DevTools window to the right of your viewport, like on the screenshot in step one, see <a href="/docs/devtools/customize#placement">Change DevTools placement</a>.</p> <h2 id="declarations" data-text="Add a CSS declaration to an element" tabindex="-1">Add a CSS declaration to an element</h2> <p>Use the <strong>Styles</strong> tab when you want to change or add CSS declarations to an element.</p> <ol> <li><p>Right-click the <code translate="no" dir="ltr">Add a background color to me!</code> text below and select <strong>Inspect</strong>.</p> <p class="aloha">Add a background color to me!</p></li> <li><p>Click <code translate="no" dir="ltr">element.style</code> near the top of the <strong>Styles</strong> tab.</p></li> <li><p>Type <code translate="no" dir="ltr">background-color</code> and press <kbd>Enter</kbd>.</p></li> <li><p>Type <code translate="no" dir="ltr">honeydew</code> and press <kbd>Enter</kbd>. In the <strong>DOM tree</strong>, you can see that an inline style declaration was applied to the element.</p></li> </ol> <p><img src="/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4.png" alt="Adding a CSS declaration to the element via the Styles tab." width="800" height="517" srcset="https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/adding-css-declaration-d1de92218eac4_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p> <h2 id="classes" data-text="Add a CSS class to an element" tabindex="-1">Add a CSS class to an element</h2> <p>Use the <strong>Styles</strong> tab to see how an element looks when a CSS class is applied to or removed from an element.</p> <ol> <li><p>Right-click the <code translate="no" dir="ltr">Add a class to me!</code> element below and select <strong>Inspect</strong>.</p> <p class="aloha">Add a class to me!</p> <div hidden class="color_me"></div></li> <li><p>Click <strong>.cls</strong>. DevTools reveals a text box where you can add classes to the selected element.</p></li> <li><p>Type <code translate="no" dir="ltr">color_me</code> in the <strong>Add new class</strong> text box and then press Enter. A checkbox appears below the <strong>Add new class</strong> text box, where you can toggle the class on and off. If the <code translate="no" dir="ltr">Add a class to me!</code> element had any other classes applied to it, you'd also be able to toggle them from here.</p></li> </ol> <p><img src="/static/docs/devtools/css/image/applying-colorme-class-cf50101604797.png" alt="Applying the color_me class to the element." width="800" height="487" srcset="https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/applying-colorme-class-cf50101604797_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p> <h2 id="pseudostates" data-text="Add a pseudostate to a class" tabindex="-1">Add a pseudostate to a class</h2> <p>Use the <strong>Styles</strong> tab to apply a CSS pseudostate to an element.</p> <ol> <li><p>Hover over the <code translate="no" dir="ltr">Hover over me!</code> text below. The background color changes.</p> <p class="aloha hover">Hover over me!</p></li> <li><p>Right-click the <code translate="no" dir="ltr">Hover over me!</code> text and select <strong>Inspect</strong>.</p></li> <li><p>In the <strong>Styles</strong> tab, click <strong>:hov</strong>.</p></li> <li><p>Check the <strong>:hover</strong> checkbox. The background color changes like before, even though you're not actually hovering over the element.</p></li> </ol> <p><img src="/static/docs/devtools/css/image/hover-pseudostate.png" alt="Toggling the hover pseudostate on an element." width="800" srcset="https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/hover-pseudostate_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p> <p>For more information, see <a href="/docs/devtools/css/reference#pseudo-class">Toggle a pseudo-class</a>.</p> <h2 id="box-model" data-text="Change the dimensions of an element" tabindex="-1">Change the dimensions of an element</h2> <p>Use the <strong>Box Model</strong> interactive diagram in the <strong>Styles</strong> tab to change the width, height, padding, margin, or border length of an element.</p> <ol> <li><p>Right-click the <code translate="no" dir="ltr">Change my margin!</code> element below and select <strong>Inspect</strong>.</p> <p class="aloha">Change my margin!</p></li> <li><p>To see the <strong>Box Model</strong>, click the <img src="/static/docs/devtools/css/image/show-sidebar-bf915ed20021b.png" alt="Show sidebar." width="22" height="20" srcset="https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/show-sidebar-bf915ed20021b_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"> <strong>Show sidebar</strong> button in the action bar on the <strong>Styles</strong> tab. <img src="/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511.png" alt="The Show sidebar button." width="800" height="505" srcset="https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/the-show-sidebar-button-4c374c3f34511_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p></li> <li><p>In the <strong>Box Model</strong> diagram in the <strong>Styles</strong> tab, hover over <strong>padding</strong>. The element's padding is highlighted in the viewport. <img src="/static/docs/devtools/css/image/elements-padding-42cdfef833fcf.png" alt="Element's padding." width="800" height="471" srcset="https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/elements-padding-42cdfef833fcf_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p></li> <li><p>Double-click the left margin in the <strong>Box Model</strong>. The element currently doesn't have margins, so the <code translate="no" dir="ltr">margin-left</code> has a value of <code translate="no" dir="ltr">-</code>.</p></li> <li><p>Type <code translate="no" dir="ltr">100</code> and press <kbd>Enter</kbd>. <img src="/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d.png" alt="Changing the element's margin-left." width="800" height="458" srcset="https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_36.png 36w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_48.png 48w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_72.png 72w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_96.png 96w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_480.png 480w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_720.png 720w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_856.png 856w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_960.png 960w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_1440.png 1440w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_1920.png 1920w,https://developer.chrome.com/static/docs/devtools/css/image/changing-elements-left-7aa96916ac40d_2880.png 2880w" sizes="(max-width: 840px) 100vw, 856px"></p></li> </ol> <p>The <strong>Box Model</strong> defaults to pixels, but it also accepts other values, such as <code translate="no" dir="ltr">25%</code>, or <code translate="no" dir="ltr">10vw</code>.</p> <aside class="key-point"><b>Key point:</b> Alternatively, in rule declarations in the <strong>Styles</strong> tab, you can change <a href="/docs/devtools/css/reference#change-length-value">length properties and their units with your pointer</a>.</aside> </div> <devsite-thumb-rating position="footer"> </devsite-thumb-rating> <div class="devsite-floating-action-buttons"> </div> </article> <devsite-content-footer class="nocontent"> <p>Except as otherwise noted, the content of this page is licensed under the <a href="https://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 License</a>, and code samples are licensed under the <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache 2.0 License</a>. 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