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property="item" typeof="WebPage"><span property="name">References</span></a><meta property="position" content="1"/></li><li property="itemListElement" typeof="ListItem"><a href="/en-US/docs/Web/API" class="breadcrumb" property="item" typeof="WebPage"><span property="name">Web APIs</span></a><meta property="position" content="2"/></li><li property="itemListElement" typeof="ListItem"><a href="/en-US/docs/Web/API/HTMLScriptElement" class="breadcrumb-current-page" property="item" typeof="WebPage"><span property="name">HTMLScriptElement</span></a><meta property="position" content="3"/></li></ol></nav><div class="article-actions"><button type="button" class="button action has-icon article-actions-toggle" aria-label="Article actions"><span class="button-wrap"><span class="icon icon-ellipses "></span><span class="article-actions-dialog-heading">Article Actions</span></span></button><ul class="article-actions-entries"><li class="article-actions-entry"><div class="languages-switcher-menu open-on-focus-within"><button id="languages-switcher-button" type="button" class="button action small has-icon languages-switcher-menu" aria-haspopup="menu"><span class="button-wrap"><span class="icon icon-language "></span>English (US)</span></button><div class="hidden"><ul class="submenu language-menu " aria-labelledby="language-menu-button"><li class=" "><form class="submenu-item locale-redirect-setting"><div class="group"><label class="switch"><input type="checkbox" name="locale-redirect"/><span class="slider"></span><span class="label">Remember language</span></label><a href="https://github.com/orgs/mdn/discussions/739" rel="external noopener noreferrer" target="_blank" title="Enable this setting to automatically switch to this language when it's available. (Click to learn more.)"><span class="icon icon-question-mark "></span></a></div></form></li><li class=" "><a data-locale="de" href="/de/docs/Web/API/HTMLScriptElement" class="button submenu-item"><span>Deutsch</span><span title="Diese Übersetzung ist Teil eines Experiments."><span class="icon icon-experimental "></span></span></a></li><li class=" "><a data-locale="ja" href="/ja/docs/Web/API/HTMLScriptElement" class="button submenu-item"><span>日本語</span></a></li><li class=" "><a data-locale="ru" href="/ru/docs/Web/API/HTMLScriptElement" class="button submenu-item"><span>Русский</span></a></li><li class=" "><a data-locale="zh-CN" href="/zh-CN/docs/Web/API/HTMLScriptElement" class="button submenu-item"><span>中文 (简体)</span></a></li></ul></div></div></li></ul></div></div></div></div><div class="main-wrapper"><div class="sidebar-container"><aside id="sidebar-quicklinks" class="sidebar" data-macro="APIRef"><button type="button" class="button action backdrop" aria-label="Collapse sidebar"><span class="button-wrap"></span></button><nav aria-label="Related Topics" class="sidebar-inner"><header class="sidebar-actions"><section class="sidebar-filter-container"><div class="sidebar-filter "><label id="sidebar-filter-label" class="sidebar-filter-label" for="sidebar-filter-input"><span class="icon icon-filter"></span><span class="visually-hidden">Filter sidebar</span></label><input id="sidebar-filter-input" autoComplete="off" class="sidebar-filter-input-field false" type="text" placeholder="Filter" value=""/><button type="button" class="button action has-icon clear-sidebar-filter-button"><span class="button-wrap"><span class="icon icon-cancel "></span><span class="visually-hidden">Clear filter input</span></span></button></div></section></header><div class="sidebar-inner-nav"><div class="in-nav-toc"><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In this article</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#instance_properties">Instance properties</a></li><li class="document-toc-item "><a class="document-toc-link" href="#static_methods">Static methods</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instance_methods">Instance methods</a></li><li class="document-toc-item "><a class="document-toc-link" href="#events">Events</a></li><li class="document-toc-item "><a class="document-toc-link" href="#examples">Examples</a></li><li class="document-toc-item "><a class="document-toc-link" href="#specifications">Specifications</a></li><li class="document-toc-item "><a class="document-toc-link" href="#browser_compatibility">Browser compatibility</a></li><li class="document-toc-item "><a class="document-toc-link" href="#see_also">See also</a></li></ul></section></div></div><div class="sidebar-body"><ol><li class="section"><a href="/en-US/docs/Web/API/HTML_DOM_API">HTML DOM API</a></li><li class="section"><em><a href="/en-US/docs/Web/API/HTMLScriptElement" aria-current="page"><code>HTMLScriptElement</code></a></em></li><li class="toggle"><details open=""><summary>Instance properties</summary><ol><li><a href="/en-US/docs/Web/API/HTMLScriptElement/async"><code>async</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/attributionSrc"><code>attributionSrc</code></a><abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future."> <span class="visually-hidden">Experimental</span> </abbr></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/blocking"><code>blocking</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/crossOrigin"><code>crossOrigin</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/defer"><code>defer</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/fetchPriority"><code>fetchPriority</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/integrity"><code>integrity</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/noModule"><code>noModule</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/referrerPolicy"><code>referrerPolicy</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/src"><code>src</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/text"><code>text</code></a></li><li><a href="/en-US/docs/Web/API/HTMLScriptElement/type"><code>type</code></a></li></ol></details></li><li class="toggle"><details open=""><summary>Static methods</summary><ol><li><a href="/en-US/docs/Web/API/HTMLScriptElement/supports_static"><code>supports()</code></a></li></ol></details></li><li class="toggle"><details open=""><summary>Inheritance</summary><ol><li><a href="/en-US/docs/Web/API/HTMLElement"><code>HTMLElement</code></a></li><li><a href="/en-US/docs/Web/API/Element"><code>Element</code></a></li><li><a href="/en-US/docs/Web/API/Node"><code>Node</code></a></li><li><a href="/en-US/docs/Web/API/EventTarget"><code>EventTarget</code></a></li></ol></details></li><li class="toggle"><details open=""><summary>Related pages for HTML DOM</summary><ol><li><a href="/en-US/docs/Web/API/BeforeUnloadEvent"><code>BeforeUnloadEvent</code></a></li><li><a href="/en-US/docs/Web/API/DOMStringMap"><code>DOMStringMap</code></a></li><li><a href="/en-US/docs/Web/API/ErrorEvent"><code>ErrorEvent</code></a></li><li><a href="/en-US/docs/Web/API/HTMLAnchorElement"><code>HTMLAnchorElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLAreaElement"><code>HTMLAreaElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLAudioElement"><code>HTMLAudioElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLBRElement"><code>HTMLBRElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLBaseElement"><code>HTMLBaseElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLBodyElement"><code>HTMLBodyElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLButtonElement"><code>HTMLButtonElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLCanvasElement"><code>HTMLCanvasElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLDListElement"><code>HTMLDListElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLDataElement"><code>HTMLDataElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLDataListElement"><code>HTMLDataListElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLDialogElement"><code>HTMLDialogElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLDivElement"><code>HTMLDivElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLDocument"><code>HTMLDocument</code></a></li><li><a href="/en-US/docs/Web/API/HTMLElement"><code>HTMLElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLEmbedElement"><code>HTMLEmbedElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLFieldSetElement"><code>HTMLFieldSetElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLFormControlsCollection"><code>HTMLFormControlsCollection</code></a></li><li><a href="/en-US/docs/Web/API/HTMLFormElement"><code>HTMLFormElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLFrameSetElement"><code>HTMLFrameSetElement</code></a><abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">Deprecated</span> </abbr></li><li><a href="/en-US/docs/Web/API/HTMLHRElement"><code>HTMLHRElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLHeadElement"><code>HTMLHeadElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLHeadingElement"><code>HTMLHeadingElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLHtmlElement"><code>HTMLHtmlElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLIFrameElement"><code>HTMLIFrameElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLImageElement"><code>HTMLImageElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLInputElement"><code>HTMLInputElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLLIElement"><code>HTMLLIElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLLabelElement"><code>HTMLLabelElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLLegendElement"><code>HTMLLegendElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLLinkElement"><code>HTMLLinkElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLMapElement"><code>HTMLMapElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLMediaElement"><code>HTMLMediaElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLMenuElement"><code>HTMLMenuElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLMetaElement"><code>HTMLMetaElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLMeterElement"><code>HTMLMeterElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLModElement"><code>HTMLModElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLOListElement"><code>HTMLOListElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLObjectElement"><code>HTMLObjectElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLOptGroupElement"><code>HTMLOptGroupElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLOptionElement"><code>HTMLOptionElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLOptionsCollection"><code>HTMLOptionsCollection</code></a></li><li><a href="/en-US/docs/Web/API/HTMLOutputElement"><code>HTMLOutputElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLParagraphElement"><code>HTMLParagraphElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLPictureElement"><code>HTMLPictureElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLPreElement"><code>HTMLPreElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLProgressElement"><code>HTMLProgressElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLQuoteElement"><code>HTMLQuoteElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLSelectElement"><code>HTMLSelectElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLSourceElement"><code>HTMLSourceElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLSpanElement"><code>HTMLSpanElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLStyleElement"><code>HTMLStyleElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTableCaptionElement"><code>HTMLTableCaptionElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTableCellElement"><code>HTMLTableCellElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTableColElement"><code>HTMLTableColElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTableElement"><code>HTMLTableElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTableRowElement"><code>HTMLTableRowElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTableSectionElement"><code>HTMLTableSectionElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTemplateElement"><code>HTMLTemplateElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTextAreaElement"><code>HTMLTextAreaElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTimeElement"><code>HTMLTimeElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTitleElement"><code>HTMLTitleElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLTrackElement"><code>HTMLTrackElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLUListElement"><code>HTMLUListElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLUnknownElement"><code>HTMLUnknownElement</code></a></li><li><a href="/en-US/docs/Web/API/HTMLVideoElement"><code>HTMLVideoElement</code></a></li><li><a href="/en-US/docs/Web/API/HashChangeEvent"><code>HashChangeEvent</code></a></li><li><a href="/en-US/docs/Web/API/History"><code>History</code></a></li><li><a href="/en-US/docs/Web/API/ImageData"><code>ImageData</code></a></li><li><a href="/en-US/docs/Web/API/Location"><code>Location</code></a></li><li><a href="/en-US/docs/Web/API/MessageChannel"><code>MessageChannel</code></a></li><li><a href="/en-US/docs/Web/API/MessageEvent"><code>MessageEvent</code></a></li><li><a href="/en-US/docs/Web/API/MessagePort"><code>MessagePort</code></a></li><li><a href="/en-US/docs/Web/API/Navigator"><code>Navigator</code></a></li><li><a href="/en-US/docs/Web/API/PageRevealEvent"><code>PageRevealEvent</code></a></li><li><a href="/en-US/docs/Web/API/PageSwapEvent"><code>PageSwapEvent</code></a></li><li><a href="/en-US/docs/Web/API/PageTransitionEvent"><code>PageTransitionEvent</code></a></li><li><a href="/en-US/docs/Web/API/Plugin"><code>Plugin</code></a><abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">Deprecated</span> </abbr></li><li><a href="/en-US/docs/Web/API/PluginArray"><code>PluginArray</code></a><abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">Deprecated</span> </abbr></li><li><a href="/en-US/docs/Web/API/PromiseRejectionEvent"><code>PromiseRejectionEvent</code></a></li><li><a href="/en-US/docs/Web/API/RadioNodeList"><code>RadioNodeList</code></a></li><li><a href="/en-US/docs/Web/API/UserActivation"><code>UserActivation</code></a></li><li><a href="/en-US/docs/Web/API/ValidityState"><code>ValidityState</code></a></li><li><a href="/en-US/docs/Web/API/Window"><code>Window</code></a></li><li><a href="/en-US/docs/Web/API/WorkletGlobalScope"><code>WorkletGlobalScope</code></a></li></ol></details></li></ol></div></div><section class="place side"></section></nav></aside><div class="toc-container"><aside class="toc"><nav><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In this article</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#instance_properties">Instance properties</a></li><li class="document-toc-item "><a class="document-toc-link" href="#static_methods">Static methods</a></li><li class="document-toc-item "><a class="document-toc-link" href="#instance_methods">Instance methods</a></li><li class="document-toc-item "><a class="document-toc-link" href="#events">Events</a></li><li class="document-toc-item "><a class="document-toc-link" href="#examples">Examples</a></li><li class="document-toc-item "><a class="document-toc-link" href="#specifications">Specifications</a></li><li class="document-toc-item "><a class="document-toc-link" href="#browser_compatibility">Browser compatibility</a></li><li class="document-toc-item "><a class="document-toc-link" href="#see_also">See also</a></li></ul></section></div></nav></aside><section class="place side"></section></div></div><main id="content" class="main-content "><article class="main-page-content" lang="en-US"><header><h1>HTMLScriptElement</h1><details class="baseline-indicator high"><summary><span class="indicator" role="img" aria-label="Baseline Check"></span><h2>Baseline <span class="not-bold">Widely available</span></h2><div class="browsers"><span class="engine" title="Supported in Chrome and Edge"><span class="browser chrome supported" role="img" aria-label="Chrome check"></span><span class="browser edge supported" role="img" aria-label="Edge check"></span></span><span class="engine" title="Supported in Firefox"><span class="browser firefox supported" role="img" aria-label="Firefox check"></span></span><span class="engine" title="Supported in Safari"><span class="browser safari supported" role="img" aria-label="Safari check"></span></span></div><span class="icon icon-chevron "></span></summary><div class="extra"><p>This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.</p><ul><li><a href="/en-US/docs/Glossary/Baseline/Compatibility" data-glean="baseline_link_learn_more" target="_blank" class="learn-more">Learn more</a></li><li><a href="#browser_compatibility" data-glean="baseline_link_bcd_table">See full compatibility</a></li><li><a href="https://survey.alchemer.com/s3/7634825/MDN-baseline-feedback?page=%2Fen-US%2Fdocs%2FWeb%2FAPI%2FHTMLScriptElement&level=high" data-glean="baseline_link_feedback" class="feedback-link" target="_blank" rel="noreferrer">Report feedback</a></li></ul></div></details></header><div class="section-content"><p>HTML <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> elements expose the <strong><code>HTMLScriptElement</code></strong> interface, which provides special properties and methods for manipulating the behavior and execution of <code><script></code> elements (beyond the inherited <a href="/en-US/docs/Web/API/HTMLElement"><code>HTMLElement</code></a> interface).</p> <p>JavaScript files should be served with the <code>text/javascript</code> <a href="/en-US/docs/Web/HTTP/MIME_types">MIME type</a>, but browsers are lenient and block them only if the script is served with an image type (<code>image/*</code>), video type (<code>video/*</code>), audio type (<code>audio/*</code>), or <code>text/csv</code>. If the script is blocked, its element receives an <a href="/en-US/docs/Web/API/HTMLElement/error_event" title="error"><code>error</code></a> event; otherwise, it receives a <a href="/en-US/docs/Web/API/Window/load_event" title="load"><code>load</code></a> event.</p><svg viewBox="-1 -1 650 42" preserveAspectRatio="xMinYMin meet"> <a style="text-decoration: none;" href="/en-US/docs/Web/API/EventTarget"> <rect x="0" y="0" width="88" height="25" fill="#fff" stroke="#D4DDE4" stroke-width="2px"></rect> <text x="44" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle"> EventTarget </text> </a> <line x1="88" y1="14" x2="118" y2="14" stroke="#D4DDE4"></line> <polyline points="88,14 98,9 98,19 88,14" stroke="#D4DDE4" fill="#fff"></polyline> <a style="text-decoration: none;" href="/en-US/docs/Web/API/Node"> <rect x="118" y="0" width="75" height="25" fill="#fff" stroke="#D4DDE4" stroke-width="2px"></rect> <text x="155.5" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle"> Node </text> </a> <line x1="193" y1="14" x2="223" y2="14" stroke="#D4DDE4"></line> <polyline points="193,14 203,9 203,19 193,14" stroke="#D4DDE4" fill="#fff"></polyline> <a style="text-decoration: none;" href="/en-US/docs/Web/API/Element"> <rect x="223" y="0" width="75" height="25" fill="#fff" stroke="#D4DDE4" stroke-width="2px"></rect> <text x="260.5" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle"> Element </text> </a> <line x1="298" y1="14" x2="328" y2="14" stroke="#D4DDE4"></line> <polyline points="298,14 308,9 308,19 298,14" stroke="#D4DDE4" fill="#fff"></polyline> <a style="text-decoration: none;" href="/en-US/docs/Web/API/HTMLElement"> <rect x="328" y="0" width="88" height="25" fill="#fff" stroke="#D4DDE4" stroke-width="2px"></rect> <text x="372" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle"> HTMLElement </text> </a> <line x1="416" y1="14" x2="446" y2="14" stroke="#D4DDE4"></line> <polyline points="416,14 426,9 426,19 416,14" stroke="#D4DDE4" fill="#fff"></polyline> <a style="text-decoration: none;" href="/en-US/docs/Web/API/HTMLScriptElement" aria-current="page"> <rect x="446" y="0" width="136" height="25" fill="#F4F7F8" stroke="#D4DDE4" stroke-width="2px"></rect> <text x="514" y="16" font-size="10px" fill="#4D4E53" text-anchor="middle"> HTMLScriptElement </text> </a></svg></div><section aria-labelledby="instance_properties"><h2 id="instance_properties"><a href="#instance_properties">Instance properties</a></h2><div class="section-content"><p><em>Inherits properties from its parent, <a href="/en-US/docs/Web/API/HTMLElement"><code>HTMLElement</code></a>.</em></p> <dl> <dt id="htmlscriptelement.attributionsrc"><a href="/en-US/docs/Web/API/HTMLScriptElement/attributionSrc"><code>HTMLScriptElement.attributionSrc</code></a> <span class="badge inline secure" title="This feature is available only in secure contexts (HTTPS)">Secure context</span> <abbr class="icon icon-experimental" title="Experimental. Expect behavior to change in the future."> <span class="visually-hidden">Experimental</span> </abbr></dt> <dd> <p>Gets and sets the <a href="/en-US/docs/Web/HTML/Element/script#attributionsrc"><code>attributionsrc</code></a> attribute on an <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element programmatically, reflecting the value of that attribute. <code>attributionsrc</code> specifies that you want the browser to send an <a href="/en-US/docs/Web/HTTP/Headers/Attribution-Reporting-Eligible"><code>Attribution-Reporting-Eligible</code></a> header along with the script resource request. On the server-side this is used to trigger sending an <a href="/en-US/docs/Web/HTTP/Headers/Attribution-Reporting-Register-Source"><code>Attribution-Reporting-Register-Source</code></a> or <a href="/en-US/docs/Web/HTTP/Headers/Attribution-Reporting-Register-Trigger"><code>Attribution-Reporting-Register-Trigger</code></a> header in the response, to register a JavaScript-based <a href="/en-US/docs/Web/API/Attribution_Reporting_API/Registering_sources#javascript-based_event_sources">attribution source</a> or <a href="/en-US/docs/Web/API/Attribution_Reporting_API/Registering_triggers#javascript-based_attribution_triggers">attribution trigger</a>, respectively.</p> </dd> <dt id="htmlscriptelement.async"><a href="/en-US/docs/Web/API/HTMLScriptElement/async"><code>HTMLScriptElement.async</code></a></dt> <dd> <p>A boolean value that controls how the script should be executed. For classic scripts, if the <code>async</code> property is set to <code>true</code>, the external script will be fetched in parallel to parsing and evaluated as soon as it is available. For <a href="/en-US/docs/Web/JavaScript/Guide/Modules">module scripts</a>, if the <code>async</code> property is set to <code>true</code>, the script and all their dependencies will be fetched in parallel to parsing and evaluated as soon as they are available.</p> </dd> <dt id="htmlscriptelement.blocking"><a href="/en-US/docs/Web/API/HTMLScriptElement/blocking"><code>HTMLScriptElement.blocking</code></a></dt> <dd> <p>A string indicating that certain operations should be blocked on the fetching of the script. It reflects the <code>blocking</code> attribute of the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element.</p> </dd> <dt id="htmlscriptelement.charset"><a href="#htmlscriptelement.charset"><code>HTMLScriptElement.charset</code></a> <abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">Deprecated</span> </abbr></dt> <dd> <p>A string representing the character encoding of an external script. It reflects the <a href="/en-US/docs/Web/HTML/Element/script#charset"><code>charset</code></a> attribute.</p> </dd> <dt id="htmlscriptelement.crossorigin"><a href="/en-US/docs/Web/API/HTMLScriptElement/crossOrigin"><code>HTMLScriptElement.crossOrigin</code></a></dt> <dd> <p>A string reflecting the <a href="/en-US/docs/Web/HTML/Attributes/crossorigin">CORS setting</a> for the script element. For classic scripts from other <a href="/en-US/docs/Glossary/Origin">origins</a>, this controls if error information will be exposed.</p> </dd> <dt id="htmlscriptelement.defer"><a href="/en-US/docs/Web/API/HTMLScriptElement/defer"><code>HTMLScriptElement.defer</code></a></dt> <dd> <p>A boolean value that controls how the script should be executed. For classic scripts, if the <code>defer</code> property is set to <code>true</code>, the external script will be executed after the document has been parsed, but before firing <a href="/en-US/docs/Web/API/Document/DOMContentLoaded_event" title="DOMContentLoaded"><code>DOMContentLoaded</code></a> event. For <a href="/en-US/docs/Web/JavaScript/Guide/Modules">module scripts</a>, the <code>defer</code> property has no effect.</p> </dd> <dt id="htmlscriptelement.event"><a href="#htmlscriptelement.event"><code>HTMLScriptElement.event</code></a> <abbr class="icon icon-deprecated" title="Deprecated. Not for use in new websites."> <span class="visually-hidden">Deprecated</span> </abbr></dt> <dd> <p>A string; an obsolete way of registering event handlers on elements in an HTML document.</p> </dd> <dt id="htmlscriptelement.fetchpriority"><a href="/en-US/docs/Web/API/HTMLScriptElement/fetchPriority"><code>HTMLScriptElement.fetchPriority</code></a></dt> <dd> <p>An optional string representing a hint given to the browser on how it should prioritize fetching of an external script relative to other external scripts. If this value is provided, it must be one of the possible permitted values: <code>high</code> to fetch at a high priority, <code>low</code> to fetch at a low priority, or <code>auto</code> to indicate no preference (which is the default). It reflects the <code>fetchpriority</code> attribute of the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element.</p> </dd> <dt id="htmlscriptelement.integrity"><a href="/en-US/docs/Web/API/HTMLScriptElement/integrity"><code>HTMLScriptElement.integrity</code></a></dt> <dd> <p>A string that contains inline metadata that a browser can use to verify that a fetched resource has been delivered without unexpected manipulation. It reflects the <code>integrity</code> attribute of the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element.</p> </dd> <dt id="htmlscriptelement.nomodule"><a href="/en-US/docs/Web/API/HTMLScriptElement/noModule"><code>HTMLScriptElement.noModule</code></a></dt> <dd> <p>A boolean value that if true, stops the script's execution in browsers that support <a href="/en-US/docs/Web/JavaScript/Guide/Modules">ES modules</a> — used to run fallback scripts in older browsers that do <em>not</em> support JavaScript modules.</p> </dd> <dt id="htmlscriptelement.referrerpolicy"><a href="/en-US/docs/Web/API/HTMLScriptElement/referrerPolicy"><code>HTMLScriptElement.referrerPolicy</code></a></dt> <dd> <p>A string that reflects the <a href="/en-US/docs/Web/HTML/Element/script#referrerpolicy"><code>referrerPolicy</code></a> HTML attribute indicating which referrer to use when fetching the script, and fetches done by that script.</p> </dd> <dt id="htmlscriptelement.src"><a href="/en-US/docs/Web/API/HTMLScriptElement/src"><code>HTMLScriptElement.src</code></a></dt> <dd> <p>A string representing the URL of an external script; this can be used as an alternative to embedding a script directly within a document. It reflects the <code>src</code> attribute of the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element.</p> </dd> <dt id="htmlscriptelement.text"><a href="/en-US/docs/Web/API/HTMLScriptElement/text"><code>HTMLScriptElement.text</code></a></dt> <dd> <p>A string that joins and returns the contents of all <a href="/en-US/docs/Web/API/Text"><code>Text</code></a> nodes inside the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element (ignoring other nodes like comments) in tree order. On setting, it acts the same way as the <a href="/en-US/docs/Web/API/Node/textContent"><code>Node.textContent</code></a> property.</p> <div class="notecard note"> <p><strong>Note:</strong> When inserted using the <a href="/en-US/docs/Web/API/Document/write"><code>Document.write()</code></a> method, <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> elements execute (typically synchronously), but when inserted using <a href="/en-US/docs/Web/API/Element/innerHTML"><code>Element.innerHTML</code></a> or <a href="/en-US/docs/Web/API/Element/outerHTML"><code>Element.outerHTML</code></a>, they do not execute at all.</p> </div> </dd> <dt id="htmlscriptelement.type"><a href="/en-US/docs/Web/API/HTMLScriptElement/type"><code>HTMLScriptElement.type</code></a></dt> <dd> <p>A string representing the type of the script. It reflects the <code>type</code> attribute of the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element.</p> </dd> </dl></div></section><section aria-labelledby="static_methods"><h2 id="static_methods"><a href="#static_methods">Static methods</a></h2><div class="section-content"><dl> <dt id="htmlscriptelement.supports"><a href="/en-US/docs/Web/API/HTMLScriptElement/supports_static" title="HTMLScriptElement.supports()"><code>HTMLScriptElement.supports()</code></a></dt> <dd> <p> Returns <code>true</code> if the browser supports scripts of the specified type and <code>false</code> otherwise. This method provides a simple and unified method for script-related feature detection. </p> </dd> </dl></div></section><section aria-labelledby="instance_methods"><h2 id="instance_methods"><a href="#instance_methods">Instance methods</a></h2><div class="section-content"><p><em>No specific methods; inherits methods from its parent, <a href="/en-US/docs/Web/API/HTMLElement"><code>HTMLElement</code></a>.</em></p></div></section><section aria-labelledby="events"><h2 id="events"><a href="#events">Events</a></h2><div class="section-content"><p><em>No specific events; inherits events from its parent, <a href="/en-US/docs/Web/API/HTMLElement"><code>HTMLElement</code></a>.</em></p></div></section><section aria-labelledby="examples"><h2 id="examples"><a href="#examples">Examples</a></h2><div class="section-content"></div></section><section aria-labelledby="dynamically_importing_scripts"><h3 id="dynamically_importing_scripts"><a href="#dynamically_importing_scripts">Dynamically importing scripts</a></h3><div class="section-content"><p> Let's create a function that imports new scripts within a document creating a <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> node <em>immediately before</em> the <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> that hosts the following code (through <a href="/en-US/docs/Web/API/Document/currentScript"><code>document.currentScript</code></a>). These scripts will be <strong>asynchronously</strong> executed. For more details, see the <a href="/en-US/docs/Web/API/HTMLScriptElement/defer"><code>defer</code></a> and <a href="/en-US/docs/Web/API/HTMLScriptElement/async"><code>async</code></a> properties. </p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>function loadError(oError) { throw new URIError(`The script ${oError.target.src} didn't load correctly.`); } function prefixScript(url, onloadFunction) { const newScript = document.createElement("script"); newScript.onerror = loadError; if (onloadFunction) { newScript.onload = onloadFunction; } document.currentScript.parentNode.insertBefore( newScript, document.currentScript, ); newScript.src = url; } </code></pre></div> <p>This next function, instead of prepending the new scripts immediately before the <a href="/en-US/docs/Web/API/Document/currentScript"><code>document.currentScript</code></a> element, appends them as children of the <a href="/en-US/docs/Web/HTML/Element/head"><code><head></code></a> tag.</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>function loadError(oError) { throw new URIError(`The script ${oError.target.src} didn't load correctly.`); } function affixScriptToHead(url, onloadFunction) { const newScript = document.createElement("script"); newScript.onerror = loadError; if (onloadFunction) { newScript.onload = onloadFunction; } document.head.appendChild(newScript); newScript.src = url; } </code></pre></div> <p>Sample usage:</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>affixScriptToHead("myScript1.js"); affixScriptToHead("myScript2.js", () => { alert('The script "myScript2.js" has been correctly loaded.'); }); </code></pre></div></div></section><section aria-labelledby="checking_if_a_script_type_is_supported"><h3 id="checking_if_a_script_type_is_supported"><a href="#checking_if_a_script_type_is_supported">Checking if a script type is supported</a></h3><div class="section-content"><p><a href="/en-US/docs/Web/API/HTMLScriptElement/supports_static" title="HTMLScriptElement.supports()"><code>HTMLScriptElement.supports()</code></a> provides a unified mechanism for checking whether a browser supports particular types of scripts.</p> <p>The example below shows how to check for module support, using the existence of the <code>noModule</code> attribute as a fallback.</p> <div class="code-example"><div class="example-header"><span class="language-name">js</span></div><pre class="brush: js notranslate"><code>function checkModuleSupport() { if ("supports" in HTMLScriptElement) { return HTMLScriptElement.supports("module"); } return "noModule" in document.createElement("script"); } </code></pre></div> <p>Classic scripts are assumed to be supported on all browsers.</p></div></section><h2 id="specifications"><a href="#specifications">Specifications</a></h2><table class="standard-table"><thead><tr><th scope="col">Specification</th></tr></thead><tbody><tr><td><a href="https://html.spec.whatwg.org/multipage/scripting.html#htmlscriptelement">HTML Standard <br/><small># htmlscriptelement</small></a></td></tr></tbody></table><h2 id="browser_compatibility"><a href="#browser_compatibility">Browser compatibility</a></h2><p>BCD tables only load in the browser<noscript> with JavaScript enabled. Enable JavaScript to view data.</noscript></p><section aria-labelledby="see_also"><h2 id="see_also"><a href="#see_also">See also</a></h2><div class="section-content"><ul> <li>HTML <a href="/en-US/docs/Web/HTML/Element/script"><code><script></code></a> element</li> <li>HTML <a href="/en-US/docs/Web/HTML/Element/noscript"><code><noscript></code></a> element</li> <li><a href="/en-US/docs/Web/API/Document/currentScript"><code>document.currentScript</code></a></li> <li><a href="/en-US/docs/Web/API/Web_Workers_API/Using_web_workers">Web Workers</a> (code snippets similar to scripts but executed in <a href="/en-US/docs/Web/API/DedicatedWorkerGlobalScope">another global context</a>)</li> </ul></div></section></article><aside class="article-footer"><div class="article-footer-inner"><div class="svg-container"><svg xmlns="http://www.w3.org/2000/svg" width="162" height="162" viewBox="0 0 162 162" fill="none" role="none"><mask id="b" fill="#fff"><path d="M97.203 47.04c8.113-7.886 18.004-13.871 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href="https://foundation.mozilla.org/">Mozilla Foundation</a>.<br/>Portions of this content are ©1998–2024 by individual mozilla.org contributors. Content available under <a href="/en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license">a Creative Commons license</a>.</p></div></div></footer></div><script type="application/json" id="hydration">{"url":"/en-US/docs/Web/API/HTMLScriptElement","doc":{"isMarkdown":true,"isTranslated":false,"isActive":true,"flaws":{},"title":"HTMLScriptElement","mdn_url":"/en-US/docs/Web/API/HTMLScriptElement","locale":"en-US","native":"English (US)","browserCompat":["api.HTMLScriptElement"],"baseline":{"baseline":"high","baseline_high_date":"2018-01-29","baseline_low_date":"2015-07-29","support":{"chrome":"1","chrome_android":"18","edge":"12","firefox":"1","firefox_android":"4","safari":"3","safari_ios":"2"}},"sidebarHTML":"<ol><li class=\"section\"><a href=\"/en-US/docs/Web/API/HTML_DOM_API\">HTML DOM API</a></li><li class=\"section\"><em><a href=\"/en-US/docs/Web/API/HTMLScriptElement\" aria-current=\"page\"><code>HTMLScriptElement</code></a></em></li><li class=\"toggle\"><details open=\"\"><summary>Instance properties</summary><ol><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/async\"><code>async</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/attributionSrc\"><code>attributionSrc</code></a><abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/blocking\"><code>blocking</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/crossOrigin\"><code>crossOrigin</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/defer\"><code>defer</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/fetchPriority\"><code>fetchPriority</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/integrity\"><code>integrity</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/noModule\"><code>noModule</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/referrerPolicy\"><code>referrerPolicy</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/src\"><code>src</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/text\"><code>text</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/type\"><code>type</code></a></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Static methods</summary><ol><li><a href=\"/en-US/docs/Web/API/HTMLScriptElement/supports_static\"><code>supports()</code></a></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Inheritance</summary><ol><li><a href=\"/en-US/docs/Web/API/HTMLElement\"><code>HTMLElement</code></a></li><li><a href=\"/en-US/docs/Web/API/Element\"><code>Element</code></a></li><li><a href=\"/en-US/docs/Web/API/Node\"><code>Node</code></a></li><li><a href=\"/en-US/docs/Web/API/EventTarget\"><code>EventTarget</code></a></li></ol></details></li><li class=\"toggle\"><details open=\"\"><summary>Related pages for HTML DOM</summary><ol><li><a href=\"/en-US/docs/Web/API/BeforeUnloadEvent\"><code>BeforeUnloadEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/DOMStringMap\"><code>DOMStringMap</code></a></li><li><a href=\"/en-US/docs/Web/API/ErrorEvent\"><code>ErrorEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLAnchorElement\"><code>HTMLAnchorElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLAreaElement\"><code>HTMLAreaElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLAudioElement\"><code>HTMLAudioElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLBRElement\"><code>HTMLBRElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLBaseElement\"><code>HTMLBaseElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLBodyElement\"><code>HTMLBodyElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLButtonElement\"><code>HTMLButtonElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLCanvasElement\"><code>HTMLCanvasElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLDListElement\"><code>HTMLDListElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLDataElement\"><code>HTMLDataElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLDataListElement\"><code>HTMLDataListElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLDialogElement\"><code>HTMLDialogElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLDivElement\"><code>HTMLDivElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLDocument\"><code>HTMLDocument</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLElement\"><code>HTMLElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLEmbedElement\"><code>HTMLEmbedElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLFieldSetElement\"><code>HTMLFieldSetElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLFormControlsCollection\"><code>HTMLFormControlsCollection</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLFormElement\"><code>HTMLFormElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLFrameSetElement\"><code>HTMLFrameSetElement</code></a><abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">Deprecated</span>\n</abbr></li><li><a href=\"/en-US/docs/Web/API/HTMLHRElement\"><code>HTMLHRElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLHeadElement\"><code>HTMLHeadElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLHeadingElement\"><code>HTMLHeadingElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLHtmlElement\"><code>HTMLHtmlElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLIFrameElement\"><code>HTMLIFrameElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLImageElement\"><code>HTMLImageElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLInputElement\"><code>HTMLInputElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLLIElement\"><code>HTMLLIElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLLabelElement\"><code>HTMLLabelElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLLegendElement\"><code>HTMLLegendElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLLinkElement\"><code>HTMLLinkElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLMapElement\"><code>HTMLMapElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLMediaElement\"><code>HTMLMediaElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLMenuElement\"><code>HTMLMenuElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLMetaElement\"><code>HTMLMetaElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLMeterElement\"><code>HTMLMeterElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLModElement\"><code>HTMLModElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLOListElement\"><code>HTMLOListElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLObjectElement\"><code>HTMLObjectElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLOptGroupElement\"><code>HTMLOptGroupElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLOptionElement\"><code>HTMLOptionElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLOptionsCollection\"><code>HTMLOptionsCollection</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLOutputElement\"><code>HTMLOutputElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLParagraphElement\"><code>HTMLParagraphElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLPictureElement\"><code>HTMLPictureElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLPreElement\"><code>HTMLPreElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLProgressElement\"><code>HTMLProgressElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLQuoteElement\"><code>HTMLQuoteElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLSelectElement\"><code>HTMLSelectElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLSourceElement\"><code>HTMLSourceElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLSpanElement\"><code>HTMLSpanElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLStyleElement\"><code>HTMLStyleElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTableCaptionElement\"><code>HTMLTableCaptionElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTableCellElement\"><code>HTMLTableCellElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTableColElement\"><code>HTMLTableColElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTableElement\"><code>HTMLTableElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTableRowElement\"><code>HTMLTableRowElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTableSectionElement\"><code>HTMLTableSectionElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTemplateElement\"><code>HTMLTemplateElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTextAreaElement\"><code>HTMLTextAreaElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTimeElement\"><code>HTMLTimeElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTitleElement\"><code>HTMLTitleElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLTrackElement\"><code>HTMLTrackElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLUListElement\"><code>HTMLUListElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLUnknownElement\"><code>HTMLUnknownElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HTMLVideoElement\"><code>HTMLVideoElement</code></a></li><li><a href=\"/en-US/docs/Web/API/HashChangeEvent\"><code>HashChangeEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/History\"><code>History</code></a></li><li><a href=\"/en-US/docs/Web/API/ImageData\"><code>ImageData</code></a></li><li><a href=\"/en-US/docs/Web/API/Location\"><code>Location</code></a></li><li><a href=\"/en-US/docs/Web/API/MessageChannel\"><code>MessageChannel</code></a></li><li><a href=\"/en-US/docs/Web/API/MessageEvent\"><code>MessageEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/MessagePort\"><code>MessagePort</code></a></li><li><a href=\"/en-US/docs/Web/API/Navigator\"><code>Navigator</code></a></li><li><a href=\"/en-US/docs/Web/API/PageRevealEvent\"><code>PageRevealEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/PageSwapEvent\"><code>PageSwapEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/PageTransitionEvent\"><code>PageTransitionEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/Plugin\"><code>Plugin</code></a><abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">Deprecated</span>\n</abbr></li><li><a href=\"/en-US/docs/Web/API/PluginArray\"><code>PluginArray</code></a><abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">Deprecated</span>\n</abbr></li><li><a href=\"/en-US/docs/Web/API/PromiseRejectionEvent\"><code>PromiseRejectionEvent</code></a></li><li><a href=\"/en-US/docs/Web/API/RadioNodeList\"><code>RadioNodeList</code></a></li><li><a href=\"/en-US/docs/Web/API/UserActivation\"><code>UserActivation</code></a></li><li><a href=\"/en-US/docs/Web/API/ValidityState\"><code>ValidityState</code></a></li><li><a href=\"/en-US/docs/Web/API/Window\"><code>Window</code></a></li><li><a href=\"/en-US/docs/Web/API/WorkletGlobalScope\"><code>WorkletGlobalScope</code></a></li></ol></details></li></ol>","sidebarMacro":"APIRef","body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<p>HTML <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> elements expose the <strong><code>HTMLScriptElement</code></strong> interface, which provides special properties and methods for manipulating the behavior and execution of <code><script></code> elements (beyond the inherited <a href=\"/en-US/docs/Web/API/HTMLElement\"><code>HTMLElement</code></a> interface).</p>\n<p>JavaScript files should be served with the <code>text/javascript</code> <a href=\"/en-US/docs/Web/HTTP/MIME_types\">MIME type</a>, but browsers are lenient and block them only if the script is served with an image type (<code>image/*</code>), video type (<code>video/*</code>), audio type (<code>audio/*</code>), or <code>text/csv</code>. If the script is blocked, its element receives an <a href=\"/en-US/docs/Web/API/HTMLElement/error_event\" title=\"error\"><code>error</code></a> event; otherwise, it receives a <a href=\"/en-US/docs/Web/API/Window/load_event\" title=\"load\"><code>load</code></a> event.</p><svg viewBox=\"-1 -1 650 42\" preserveAspectRatio=\"xMinYMin meet\">\n <a style=\"text-decoration: none;\" href=\"/en-US/docs/Web/API/EventTarget\">\n <rect x=\"0\" y=\"0\" width=\"88\" height=\"25\" fill=\"#fff\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"44\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n EventTarget\n </text>\n </a>\n <line x1=\"88\" y1=\"14\" x2=\"118\" y2=\"14\" stroke=\"#D4DDE4\"></line>\n <polyline points=\"88,14 98,9 98,19 88,14\" stroke=\"#D4DDE4\" fill=\"#fff\"></polyline>\n <a style=\"text-decoration: none;\" href=\"/en-US/docs/Web/API/Node\">\n <rect x=\"118\" y=\"0\" width=\"75\" height=\"25\" fill=\"#fff\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"155.5\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n Node\n </text>\n </a>\n <line x1=\"193\" y1=\"14\" x2=\"223\" y2=\"14\" stroke=\"#D4DDE4\"></line>\n <polyline points=\"193,14 203,9 203,19 193,14\" stroke=\"#D4DDE4\" fill=\"#fff\"></polyline>\n <a style=\"text-decoration: none;\" href=\"/en-US/docs/Web/API/Element\">\n <rect x=\"223\" y=\"0\" width=\"75\" height=\"25\" fill=\"#fff\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"260.5\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n Element\n </text>\n </a>\n <line x1=\"298\" y1=\"14\" x2=\"328\" y2=\"14\" stroke=\"#D4DDE4\"></line>\n <polyline points=\"298,14 308,9 308,19 298,14\" stroke=\"#D4DDE4\" fill=\"#fff\"></polyline>\n <a style=\"text-decoration: none;\" href=\"/en-US/docs/Web/API/HTMLElement\">\n <rect x=\"328\" y=\"0\" width=\"88\" height=\"25\" fill=\"#fff\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"372\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n HTMLElement\n </text>\n </a>\n <line x1=\"416\" y1=\"14\" x2=\"446\" y2=\"14\" stroke=\"#D4DDE4\"></line>\n <polyline points=\"416,14 426,9 426,19 416,14\" stroke=\"#D4DDE4\" fill=\"#fff\"></polyline>\n <a style=\"text-decoration: none;\" href=\"/en-US/docs/Web/API/HTMLScriptElement\" aria-current=\"page\">\n <rect x=\"446\" y=\"0\" width=\"136\" height=\"25\" fill=\"#F4F7F8\" stroke=\"#D4DDE4\" stroke-width=\"2px\"></rect>\n <text x=\"514\" y=\"16\" font-size=\"10px\" fill=\"#4D4E53\" text-anchor=\"middle\">\n HTMLScriptElement\n </text>\n </a></svg>"}},{"type":"prose","value":{"id":"instance_properties","title":"Instance properties","isH3":false,"content":"<p><em>Inherits properties from its parent, <a href=\"/en-US/docs/Web/API/HTMLElement\"><code>HTMLElement</code></a>.</em></p>\n<dl>\n <dt id=\"htmlscriptelement.attributionsrc\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/attributionSrc\"><code>HTMLScriptElement.attributionSrc</code></a> <span class=\"badge inline secure\" title=\"This feature is available only in secure contexts (HTTPS)\">Secure context</span> <abbr class=\"icon icon-experimental\" title=\"Experimental. Expect behavior to change in the future.\">\n <span class=\"visually-hidden\">Experimental</span>\n</abbr></dt>\n <dd>\n <p>Gets and sets the <a href=\"/en-US/docs/Web/HTML/Element/script#attributionsrc\"><code>attributionsrc</code></a> attribute on an <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element programmatically, reflecting the value of that attribute. <code>attributionsrc</code> specifies that you want the browser to send an <a href=\"/en-US/docs/Web/HTTP/Headers/Attribution-Reporting-Eligible\"><code>Attribution-Reporting-Eligible</code></a> header along with the script resource request. On the server-side this is used to trigger sending an <a href=\"/en-US/docs/Web/HTTP/Headers/Attribution-Reporting-Register-Source\"><code>Attribution-Reporting-Register-Source</code></a> or <a href=\"/en-US/docs/Web/HTTP/Headers/Attribution-Reporting-Register-Trigger\"><code>Attribution-Reporting-Register-Trigger</code></a> header in the response, to register a JavaScript-based <a href=\"/en-US/docs/Web/API/Attribution_Reporting_API/Registering_sources#javascript-based_event_sources\">attribution source</a> or <a href=\"/en-US/docs/Web/API/Attribution_Reporting_API/Registering_triggers#javascript-based_attribution_triggers\">attribution trigger</a>, respectively.</p>\n </dd>\n <dt id=\"htmlscriptelement.async\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/async\"><code>HTMLScriptElement.async</code></a></dt>\n <dd>\n <p>A boolean value that controls how the script should be executed. For classic scripts, if the <code>async</code> property is set to <code>true</code>, the external script will be fetched in parallel to parsing and evaluated as soon as it is available. For <a href=\"/en-US/docs/Web/JavaScript/Guide/Modules\">module scripts</a>, if the <code>async</code> property is set to <code>true</code>, the script and all their dependencies will be fetched in parallel to parsing and evaluated as soon as they are available.</p>\n </dd>\n <dt id=\"htmlscriptelement.blocking\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/blocking\"><code>HTMLScriptElement.blocking</code></a></dt>\n <dd>\n <p>A string indicating that certain operations should be blocked on the fetching of the script. It reflects the <code>blocking</code> attribute of the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element.</p>\n </dd>\n <dt id=\"htmlscriptelement.charset\"><a href=\"#htmlscriptelement.charset\"><code>HTMLScriptElement.charset</code></a> <abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">Deprecated</span>\n</abbr></dt>\n <dd>\n <p>A string representing the character encoding of an external script. It reflects the <a href=\"/en-US/docs/Web/HTML/Element/script#charset\"><code>charset</code></a> attribute.</p>\n </dd>\n <dt id=\"htmlscriptelement.crossorigin\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/crossOrigin\"><code>HTMLScriptElement.crossOrigin</code></a></dt>\n <dd>\n <p>A string reflecting the <a href=\"/en-US/docs/Web/HTML/Attributes/crossorigin\">CORS setting</a> for the script element. For classic scripts from other <a href=\"/en-US/docs/Glossary/Origin\">origins</a>, this controls if error information will be exposed.</p>\n </dd>\n <dt id=\"htmlscriptelement.defer\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/defer\"><code>HTMLScriptElement.defer</code></a></dt>\n <dd>\n <p>A boolean value that controls how the script should be executed. For classic scripts, if the <code>defer</code> property is set to <code>true</code>, the external script will be executed after the document has been parsed, but before firing <a href=\"/en-US/docs/Web/API/Document/DOMContentLoaded_event\" title=\"DOMContentLoaded\"><code>DOMContentLoaded</code></a> event. For <a href=\"/en-US/docs/Web/JavaScript/Guide/Modules\">module scripts</a>, the <code>defer</code> property has no effect.</p>\n </dd>\n <dt id=\"htmlscriptelement.event\"><a href=\"#htmlscriptelement.event\"><code>HTMLScriptElement.event</code></a> <abbr class=\"icon icon-deprecated\" title=\"Deprecated. Not for use in new websites.\">\n <span class=\"visually-hidden\">Deprecated</span>\n</abbr></dt>\n <dd>\n <p>A string; an obsolete way of registering event handlers on elements in an HTML document.</p>\n </dd>\n <dt id=\"htmlscriptelement.fetchpriority\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/fetchPriority\"><code>HTMLScriptElement.fetchPriority</code></a></dt>\n <dd>\n <p>An optional string representing a hint given to the browser on how it should prioritize fetching of an external script relative to other external scripts. If this value is provided, it must be one of the possible permitted values: <code>high</code> to fetch at a high priority, <code>low</code> to fetch at a low priority, or <code>auto</code> to indicate no preference (which is the default). It reflects the <code>fetchpriority</code> attribute of the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element.</p>\n </dd>\n <dt id=\"htmlscriptelement.integrity\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/integrity\"><code>HTMLScriptElement.integrity</code></a></dt>\n <dd>\n <p>A string that contains inline metadata that a browser can use to verify that a fetched resource has been delivered without unexpected manipulation. It reflects the <code>integrity</code> attribute of the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element.</p>\n </dd>\n <dt id=\"htmlscriptelement.nomodule\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/noModule\"><code>HTMLScriptElement.noModule</code></a></dt>\n <dd>\n <p>A boolean value that if true, stops the script's execution in browsers that support <a href=\"/en-US/docs/Web/JavaScript/Guide/Modules\">ES modules</a> — used to run fallback scripts in older browsers that do <em>not</em> support JavaScript modules.</p>\n </dd>\n <dt id=\"htmlscriptelement.referrerpolicy\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/referrerPolicy\"><code>HTMLScriptElement.referrerPolicy</code></a></dt>\n <dd>\n <p>A string that reflects the <a href=\"/en-US/docs/Web/HTML/Element/script#referrerpolicy\"><code>referrerPolicy</code></a> HTML attribute indicating which referrer to use when fetching the script, and fetches done by that script.</p>\n </dd>\n <dt id=\"htmlscriptelement.src\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/src\"><code>HTMLScriptElement.src</code></a></dt>\n <dd>\n <p>A string representing the URL of an external script; this can be used as an alternative to embedding a script directly within a document. It reflects the <code>src</code> attribute of the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element.</p>\n </dd>\n <dt id=\"htmlscriptelement.text\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/text\"><code>HTMLScriptElement.text</code></a></dt>\n <dd>\n <p>A string that joins and returns the contents of all <a href=\"/en-US/docs/Web/API/Text\"><code>Text</code></a> nodes inside the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element (ignoring other nodes like comments) in tree order. On setting, it acts the same way as the <a href=\"/en-US/docs/Web/API/Node/textContent\"><code>Node.textContent</code></a> property.</p>\n <div class=\"notecard note\">\n <p><strong>Note:</strong> When inserted using the <a href=\"/en-US/docs/Web/API/Document/write\"><code>Document.write()</code></a> method, <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> elements execute (typically synchronously), but when inserted using <a href=\"/en-US/docs/Web/API/Element/innerHTML\"><code>Element.innerHTML</code></a> or <a href=\"/en-US/docs/Web/API/Element/outerHTML\"><code>Element.outerHTML</code></a>, they do not execute at all.</p>\n </div>\n </dd>\n <dt id=\"htmlscriptelement.type\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/type\"><code>HTMLScriptElement.type</code></a></dt>\n <dd>\n <p>A string representing the type of the script. It reflects the <code>type</code> attribute of the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element.</p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"static_methods","title":"Static methods","isH3":false,"content":"<dl>\n <dt id=\"htmlscriptelement.supports\"><a href=\"/en-US/docs/Web/API/HTMLScriptElement/supports_static\" title=\"HTMLScriptElement.supports()\"><code>HTMLScriptElement.supports()</code></a></dt>\n <dd>\n <p>\n Returns <code>true</code> if the browser supports scripts of the specified type and <code>false</code> otherwise.\n This method provides a simple and unified method for script-related feature detection.\n </p>\n </dd>\n</dl>"}},{"type":"prose","value":{"id":"instance_methods","title":"Instance methods","isH3":false,"content":"<p><em>No specific methods; inherits methods from its parent, <a href=\"/en-US/docs/Web/API/HTMLElement\"><code>HTMLElement</code></a>.</em></p>"}},{"type":"prose","value":{"id":"events","title":"Events","isH3":false,"content":"<p><em>No specific events; inherits events from its parent, <a href=\"/en-US/docs/Web/API/HTMLElement\"><code>HTMLElement</code></a>.</em></p>"}},{"type":"prose","value":{"id":"examples","title":"Examples","isH3":false,"content":""}},{"type":"prose","value":{"id":"dynamically_importing_scripts","title":"Dynamically importing scripts","isH3":true,"content":"<p>\n Let's create a function that imports new scripts within a document creating a <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> node <em>immediately before</em> the <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> that hosts the following code (through <a href=\"/en-US/docs/Web/API/Document/currentScript\"><code>document.currentScript</code></a>).\n These scripts will be <strong>asynchronously</strong> executed.\n For more details, see the <a href=\"/en-US/docs/Web/API/HTMLScriptElement/defer\"><code>defer</code></a> and <a href=\"/en-US/docs/Web/API/HTMLScriptElement/async\"><code>async</code></a> properties.\n</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>function loadError(oError) {\n throw new URIError(`The script ${oError.target.src} didn't load correctly.`);\n}\n\nfunction prefixScript(url, onloadFunction) {\n const newScript = document.createElement(\"script\");\n newScript.onerror = loadError;\n if (onloadFunction) {\n newScript.onload = onloadFunction;\n }\n document.currentScript.parentNode.insertBefore(\n newScript,\n document.currentScript,\n );\n newScript.src = url;\n}\n</code></pre></div>\n<p>This next function, instead of prepending the new scripts immediately before the <a href=\"/en-US/docs/Web/API/Document/currentScript\"><code>document.currentScript</code></a> element, appends them as children of the <a href=\"/en-US/docs/Web/HTML/Element/head\"><code><head></code></a> tag.</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>function loadError(oError) {\n throw new URIError(`The script ${oError.target.src} didn't load correctly.`);\n}\n\nfunction affixScriptToHead(url, onloadFunction) {\n const newScript = document.createElement(\"script\");\n newScript.onerror = loadError;\n if (onloadFunction) {\n newScript.onload = onloadFunction;\n }\n document.head.appendChild(newScript);\n newScript.src = url;\n}\n</code></pre></div>\n<p>Sample usage:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>affixScriptToHead(\"myScript1.js\");\naffixScriptToHead(\"myScript2.js\", () => {\n alert('The script \"myScript2.js\" has been correctly loaded.');\n});\n</code></pre></div>"}},{"type":"prose","value":{"id":"checking_if_a_script_type_is_supported","title":"Checking if a script type is supported","isH3":true,"content":"<p><a href=\"/en-US/docs/Web/API/HTMLScriptElement/supports_static\" title=\"HTMLScriptElement.supports()\"><code>HTMLScriptElement.supports()</code></a> provides a unified mechanism for checking whether a browser supports particular types of scripts.</p>\n<p>The example below shows how to check for module support, using the existence of the <code>noModule</code> attribute as a fallback.</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">js</span></div><pre class=\"brush: js notranslate\"><code>function checkModuleSupport() {\n if (\"supports\" in HTMLScriptElement) {\n return HTMLScriptElement.supports(\"module\");\n }\n return \"noModule\" in document.createElement(\"script\");\n}\n</code></pre></div>\n<p>Classic scripts are assumed to be supported on all browsers.</p>"}},{"type":"specifications","value":{"title":"Specifications","id":"specifications","isH3":false,"specifications":[{"bcdSpecificationURL":"https://html.spec.whatwg.org/multipage/scripting.html#htmlscriptelement","title":"HTML Standard"}],"query":"api.HTMLScriptElement"}},{"type":"browser_compatibility","value":{"title":"Browser compatibility","id":"browser_compatibility","isH3":false,"query":"api.HTMLScriptElement"}},{"type":"prose","value":{"id":"see_also","title":"See also","isH3":false,"content":"<ul>\n <li>HTML <a href=\"/en-US/docs/Web/HTML/Element/script\"><code><script></code></a> element</li>\n <li>HTML <a href=\"/en-US/docs/Web/HTML/Element/noscript\"><code><noscript></code></a> element</li>\n <li><a href=\"/en-US/docs/Web/API/Document/currentScript\"><code>document.currentScript</code></a></li>\n <li><a href=\"/en-US/docs/Web/API/Web_Workers_API/Using_web_workers\">Web Workers</a> (code snippets similar to scripts but executed in <a href=\"/en-US/docs/Web/API/DedicatedWorkerGlobalScope\">another global context</a>)</li>\n</ul>"}}],"toc":[{"text":"Instance properties","id":"instance_properties"},{"text":"Static methods","id":"static_methods"},{"text":"Instance methods","id":"instance_methods"},{"text":"Events","id":"events"},{"text":"Examples","id":"examples"},{"text":"Specifications","id":"specifications"},{"text":"Browser compatibility","id":"browser_compatibility"},{"text":"See also","id":"see_also"}],"summary":"HTML \u003cscript> elements expose the HTMLScriptElement interface, which provides special properties and methods for manipulating the behavior and execution of \u003cscript> elements (beyond the inherited HTMLElement interface).","popularity":0,"modified":"2024-11-07T15:33:32.000Z","other_translations":[{"locale":"de","title":"HTMLScriptElement","native":"Deutsch"},{"locale":"ja","title":"HTMLScriptElement","native":"日本語"},{"locale":"ru","title":"HTMLScriptElement","native":"Русский"},{"locale":"zh-CN","title":"HTMLScriptElement","native":"中文 (简体)"}],"pageType":"web-api-interface","source":{"folder":"en-us/web/api/htmlscriptelement","github_url":"https://github.com/mdn/content/blob/main/files/en-us/web/api/htmlscriptelement/index.md","last_commit_url":"https://github.com/mdn/content/commit/7cd4706990ab95794415aee05ba0a9662e742a17","filename":"index.md"},"short_title":"HTMLScriptElement","parents":[{"uri":"/en-US/docs/Web","title":"References"},{"uri":"/en-US/docs/Web/API","title":"Web APIs"},{"uri":"/en-US/docs/Web/API/HTMLScriptElement","title":"HTMLScriptElement"}],"pageTitle":"HTMLScriptElement - Web APIs | MDN","noIndexing":false}}</script></body></html>