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<input value="検索" type="submit" class="entrysearch-searchbox-btn js-entrysearch-form-button" aria-label="検索"> </form> </div> <div class="centerarticle-wrapper"> <div class="left-container"> <div class="centerarticle-sidebar-menu"> <h3 class="centerarticle-aside-title">検索対象</h3> <ul class="centerarticle-sub-navi"> <li><a href="/q/devtools?users=3&target=all&safe=on&date_range=5y&sort=popular" >すべて</a></li> <li><a href="/q/devtools?safe=on&users=3&target=tag&date_range=5y&sort=popular" class="is-current">タグ</a></li> <li><a href="/q/devtools?target=title&users=3&safe=on&date_range=5y&sort=popular" >タイトル</a></li> <li><a href="/q/devtools?sort=popular&date_range=5y&target=text&users=3&safe=on" >本文</a></li> </ul> </div> <div class="centerarticle-sidebar-menu"> <h3 class="centerarticle-aside-title">並び順</h3> <ul class="centerarticle-sub-navi"> <li><a href="/q/devtools?safe=on&users=3&target=tag&sort=recent&date_range=5y" >新着</a></li> <li><a href="/q/devtools?date_range=5y&sort=popular&safe=on&target=tag&users=3" class="is-current">人気</a></li> </ul> </div> <div class="centerarticle-sidebar-menu"> <h3 class="centerarticle-aside-title">ブックマーク数</h3> <ul class="centerarticle-sub-navi"> <li><a href="/q/devtools?date_range=5y&sort=popular&safe=on&target=tag&users=1" >1 user</a></li> <li><a href="/q/devtools?sort=popular&date_range=5y&target=tag&users=3&safe=on" class="is-current">3 users</a></li> <li><a href="/q/devtools?users=50&target=tag&safe=on&date_range=5y&sort=popular" >50 users</a></li> <li><a href="/q/devtools?target=tag&users=100&safe=on&date_range=5y&sort=popular" >100 users</a></li> <li><a href="/q/devtools?target=tag&users=500&safe=on&date_range=5y&sort=popular" >500 users</a></li> </ul> </div> <div class="centerarticle-sidebar-menu js-safe-search-div is-hidden" title="セーフサーチはログイン時にのみoffにできます"> <h3 class="centerarticle-aside-title">セーフサーチ</h3> <ul class="centerarticle-sub-navi"> <li><a href="/q/devtools?sort=popular&date_range=5y&users=3&target=tag&safe=on" class="is-current">オン</a></li> <li><a href="/q/devtools?date_range=5y&sort=popular&users=3&target=tag&safe=off" >オフ</a></li> </ul> </div> <div class="centerarticle-sidebar-menu js-entrysearch-date"> <h3 class="centerarticle-aside-title">期間指定</h3> <ul class="centerarticle-sub-navi"> <li><a href="/q/devtools?sort=popular&date_range=all&safe=on&users=3&target=tag" >すべて</a></li> <li><a href="/q/devtools?date_range=w&sort=popular&safe=on&target=tag&users=3" >1週間</a></li> <li><a href="/q/devtools?sort=popular&date_range=m&users=3&target=tag&safe=on" >1ヶ月</a></li> <li><a href="/q/devtools?users=3&target=tag&safe=on&date_range=y&sort=popular" >1年</a></li> </ul> <form method="get" class="js-entrysearch-datepicker-form"> <input value="devtools" class="js-entrysearch-form-text-input" type="hidden"> <input value="tag" name="target" type="hidden"> <input value="popular" name="sort" type="hidden"> <input value="3" name="users" type="hidden"> <input value="on" name="safe" type="hidden"> <ul class="centerarticle-sub-navi"> <li><input class="js-entrysearch-datepicker-start entrysearch-searchbox-dateInput" value="" type="text" name="date_begin"> から</li> <li><input class="js-entrysearch-datepicker-end entrysearch-searchbox-dateInput" value="" type="text" name="date_end"> まで</li> <li><input value="検索" type="submit" class="entrysearch-searchbox-btn js-entrysearch-form-button"><li> </ul> </form> </div> </div> <div class="entrysearch-bar"> <p class="entrysearch-bar-results">1 - 40 件 / 88件</p> <div class="entrysearch-bar-inner"> <button class="entrysearch-filter-btn js-entrysearch-filter-btn">絞り込み</button> <a class="entrysearch-sort-btn" href="/q/devtools?users=3&target=tag&safe=on&sort=popular&date_range=5y">新着順</a> <a class="entrysearch-sort-btn is-current" href="/q/devtools?safe=on&users=3&target=tag&date_range=5y&sort=recent">人気順</a> </div> </div> <div class="entrysearch-filter js-entrysearch-filter is-hidden"> <div class="entrysearch-filter-header"> <h2 class="entrysearch-filter-title">絞り込み</h2> <button class="entrysearch-filter-close js-entrysearch-filter-close"></button> </div> <ul class="entrysearch-filter-list"> <li class="entrysearch-filter-item js-entrysearch-target-dropdown"> <h3 class="entrysearch-filter-item-head">検索対象</h3> <div class="entrysearch-filter-item-value-wrapper"> <select class="entrysearch-filter-item-value js-entrysearch-filter-target"> <option value="all" >すべて</option> <option value="tag" selected>タグ</option> <option value="title" >タイトル</option> <option value="text" >本文</option> </select> </div> </li> <li class="entrysearch-filter-item"> <h3 class="entrysearch-filter-item-head">ブックマーク数</h3> <div class="entrysearch-filter-item-value-wrapper"> <select class="entrysearch-filter-item-value js-entrysearch-filter-users"> <option value="1" >1 user</option> <option value="3" selected>3 users</option> <option value="50" >50 users</option> <option value="100" >100 users</option> <option value="500" >500 users</option> </select> </div> </li> <li class="entrysearch-filter-item"> <h3 class="entrysearch-filter-item-head">期間</h3> <div class="entrysearch-filter-item-value-wrapper"> <select class="entrysearch-filter-item-value js-entrysearch-filter-daterange"> <option value="all">すべて</option> <option value="w" >1週間</option> <option value="m" >1ヶ月</option> <option value="y" >1年</option> </select> </div> </li> <li class="entrysearch-filter-item js-safe-search-div is-hidden"> <h3 class="entrysearch-filter-item-head">セーフサーチ</h3> <div class="entrysearch-filter-checkbox"> <input type="checkbox" name="safesearch" id="safesearch" class="js-entryseach-safesearch" checked> <label class="entrysearch-filter-checkbox-label" for="safesearch"></label> </div> </li> </ul> <div class="entrysearch-filter-footer"> <button class="entrysearch-filter-search-btn styleguide-btn-primary js-entrysearch-filter-search-btn">検索する</button> <button class="entrysearch-filter-clear-btn styleguide-btn-text js-entrysearch-filter-clear-btn">条件をクリアする</button> </div> </div> <div class="search-container"> <h2 class="entrysearch-title"> <span class="entrysearch-word">devtoolsの検索結果</span><span class="entrysearch-result">1 - 40 件 / 88件</span> </h2> <div class="entrysearch-summary-text"> <span>devtools</span>に関するエントリは<span>88</span>件あります。 <span>chrome</span>、 <span>開発</span>、 <span>web制作</span> などが関連タグです。人気エントリには <span>『ブラウザでリロードしながらキャッシュの挙動を確認してる全ての開発者へ | blog.jxck.io』</span>などがあります。 </div> <div class="entrysearch-related-entries" data-gtm-inview-label="entry-search-recommend-header"> <h3 class="entrysearch-related-title">devtoolsの関連エントリー</h3> <ul class="entrysearch-related-list"> <li class="entrysearch-related-listitem"> <div class="entrysearch-related-entry"> <a href="https://blog.cybozu.io/entry/2021/09/13/080000" class="entrysearch-related-image" target="_blank" rel="noopener" data-gtm-click-label="entry-search-recommend-header-c-image"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/705778ef5bc29540bdc479d6efe2db48bd418427/height=288;version=1;width=512/https%3A%2F%2Fogimage.blog.st-hatena.com%2F8454420450104491317%2F13574176438009701939%2F1631487612" alt="フロントエンド刷新のために DevTools を作って開発を捗らせる - Cybozu Inside Out | サイボウズエンジニアのブログ"> </a> <h4 class="entrysearch-related-entry-title"> <a href="https://blog.cybozu.io/entry/2021/09/13/080000" target="_blank" rel="noopener" data-gtm-click-label="entry-search-recommend-header-c-title"> フロントエンド刷新のために DevTools を作って開発を捗らせる - Cybozu Inside Out | サイボウズエンジニアのブログ </a> </h4> <a href="/entry/s/blog.cybozu.io/entry/2021/09/13/080000" class="entrysearch-related-users" data-gtm-click-label="entry-search-recommend-header-c-users"> 160 users </a> </div> </li> <li class="entrysearch-related-listitem"> <div class="entrysearch-related-entry"> <a href="https://motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild" class="entrysearch-related-image" target="_blank" rel="noopener" data-gtm-click-label="entry-search-recommend-header-c-image"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/4107f19d2046923761ebdcd4ecb043b48db2a465/height=288;version=1;width=512/https%3A%2F%2Fgithub.com%2Fmotemen%2Fchrome-extension-esbuild%2Fraw%2Fmain%2Fdocs%2Fscreencast.gif" alt="DevTools上でesbuildするChrome拡張を書いた - 詩と創作・思索のひろば"> </a> <h4 class="entrysearch-related-entry-title"> <a href="https://motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild" target="_blank" rel="noopener" data-gtm-click-label="entry-search-recommend-header-c-title"> DevTools上でesbuildするChrome拡張を書いた - 詩と創作・思索のひろば </a> </h4> <a href="/entry/s/motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild" class="entrysearch-related-users" data-gtm-click-label="entry-search-recommend-header-c-users"> 100 users </a> </div> </li> <li class="entrysearch-related-listitem"> <div class="entrysearch-related-entry"> <a href="https://polamjag.hatenablog.jp/entry/2021/12/22/100000" 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has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Chromeに新しく実装された「CSS Overview」が非常に便利なので、紹介します。表示しているページのCSSの概要、カラー、フォント、メディアクエリ、未使用の宣言が一覧でき、制作したページの検証やスタイルガイドとしても役立ちます。 Chromeの新機能「CSS Overview」 Fyi: New in Chrome: CSS Overview Chromeの新機能「CSS Overview」の準備 Chromeの新機能「CSS Overview」の使い方 Chromeの新機能「CSS Overview」の準備まずは、Chrome デベロッパーツールを開き、右上の歯車アイコン（Settings）をクリックします。</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/css" data-gtm-click-label="entry-search-result-item-tag">css</a></li> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/%E3%83%84%E3%83%BC%E3%83%AB" data-gtm-click-label="entry-search-result-item-tag">ツール</a></li> <li><a href="/q/web%E5%88%B6%E4%BD%9C" data-gtm-click-label="entry-search-result-item-tag">web制作</a></li> <li><a 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data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://www.publickey1.jp/blog/21/chrome_97devtoolswebpuppeteer.html"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://www.publickey1.jp/blog/21/chrome_97devtoolswebpuppeteer.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" 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class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Chrome 97のDevToolsに新機能、Webブラウザ上の操作を記録、再実行、編集、保存。Puppeteerスクリプトへのエクスポートも Googleは、来年1月に登場予定のChrome 97で、DevToolsにWebブラウザ上での操作内容を記録し、再実行や編集、保存などを可能にする新機能を搭載することを明らかにしました。 Introducing the new Recorder panel You can now record, replay and measure user interactions with @ChromeDevTools. See it in action - ordering coffee. Learn more about this preview feature (available in Chrome Canary now): https://t.c</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/web" data-gtm-click-label="entry-search-result-item-tag">web</a></li> <li><a href="/q/%E3%83%84%E3%83%BC%E3%83%AB" data-gtm-click-label="entry-search-result-item-tag">ツール</a></li> <li><a href="/q/%E3%83%96%E3%83%A9%E3%82%A6%E3%82%B6" data-gtm-click-label="entry-search-result-item-tag">ブラウザ</a></li> <li><a href="/q/browser" data-gtm-click-label="entry-search-result-item-tag">browser</a></li> <li><a href="/q/programming" data-gtm-click-label="entry-search-result-item-tag">programming</a></li> <li><a href="/q/web%E5%88%B6%E4%BD%9C" data-gtm-click-label="entry-search-result-item-tag">web制作</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/%22Google%20Chrome%22" data-gtm-click-label="entry-search-result-item-tag">Google Chrome</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://www.publickey1.jp/blog/21/chrome_97devtoolswebpuppeteer.html"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://www.publickey1.jp/blog/21/chrome_97devtoolswebpuppeteer.html" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/c1248db24dcebd6aa7310f606be588f82b6725f5/height=288;version=1;width=512/https%3A%2F%2Fwww.publickey1.jp%2F2021%2Fdevtoolsrecord1101.gif" alt="Chrome 97のDevToolsに新機能、Webブラウザ上の操作を記録、再実行、編集、保存。Puppeteerスクリプトへのエクスポートも" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://blog.pastak.net/entry/2021/05/03/011623"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://blog.pastak.net/entry/2021/05/03/011623" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fblog.pastak.net%2Fentry%2F2021%2F05%2F03%2F011623" alt="">Chrome Devtoolのmonitorを使うと関数の呼び出しを観察できて便利 - ぱすたけ日記 </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/blog.pastak.net/entry/2021/05/03/011623" class="js-keyboard-entry-page-openable" title="Chrome Devtoolのmonitorを使うと関数の呼び出しを観察できて便利 - ぱすたけ日記 (465 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 465 users </a> </span> </li> <li> <a href="/site/blog.pastak.net/" title="『blog.pastak.net』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> blog.pastak.net </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2021/05/03</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">を読んで思い出したのでご紹介です。元の記事と同様に以下の関数 sum について、 function sum(nums, acc = 0) { console.log({ nums, acc }); if (nums.length === 0) return 0; if (nums.length === 1) return nums[0]; return sum(nums.slice(1), acc + nums[0]); } この関数sumの引数 (nums と acc) の呼び出しごとの変化を見たい場合は、所謂プリントデバッグや debugger を使うのは一般的なテクニックとしてよく知られていますが、このような関数呼び出し時の引数を知りたい場合はmonitor(function)という関数を使うことで同様の効果を得ることが出来ます。この場合は monitor(sum)とした後に、関</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/javascript" data-gtm-click-label="entry-search-result-item-tag">javascript</a></li> <li><a href="/q/debug" data-gtm-click-label="entry-search-result-item-tag">debug</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/%E3%83%87%E3%83%90%E3%83%83%E3%82%B0" data-gtm-click-label="entry-search-result-item-tag">デバッグ</a></li> <li><a href="/q/development" data-gtm-click-label="entry-search-result-item-tag">development</a></li> <li><a href="/q/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0" data-gtm-click-label="entry-search-result-item-tag">プログラミング</a></li> <li><a href="/q/programming" data-gtm-click-label="entry-search-result-item-tag">programming</a></li> <li><a href="/q/%22Google%20Chrome%22" data-gtm-click-label="entry-search-result-item-tag">Google Chrome</a></li> <li><a href="/q/%E4%BE%BF%E5%88%A9" data-gtm-click-label="entry-search-result-item-tag">便利</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://blog.pastak.net/entry/2021/05/03/011623"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://blog.pastak.net/entry/2021/05/03/011623" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/ac998782f34ad7ff0df6ced816af577480821aab/height=288;version=1;width=512/https%3A%2F%2Fcdn.image.st-hatena.com%2Fimage%2Fscale%2F64be8437922be39f20b186dcc0939ed088777c34%2Fbackend%3Dimagemagick%3Bversion%3D1%3Bwidth%3D1300%2Fhttps%253A%252F%252Fi.gyazo.com%252F216d659c2f2bf950c3a9c2a961c60d45.png" alt="Chrome Devtoolのmonitorを使うと関数の呼び出しを観察できて便利 - ぱすたけ日記" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://qiita.com/satoki/items/f4398327985b830ca23d"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://qiita.com/satoki/items/f4398327985b830ca23d" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fqiita.com%2Fsatoki%2Fitems%2Ff4398327985b830ca23d" alt="">ブラウザ開発者ツールのネットワークタブに表示されない情報送信手法 - Qiita </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/qiita.com/satoki/items/f4398327985b830ca23d" class="js-keyboard-entry-page-openable" title="ブラウザ開発者ツールのネットワークタブに表示されない情報送信手法 - Qiita (460 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 460 users </a> </span> </li> <li> <a href="/site/qiita.com/satoki" title="『qiita.com/satoki』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> qiita.com/satoki </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2024/07/15</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Deleted articles cannot be recovered. Draft of this article would be also deleted. Are you sure you want to delete this article? はじめにはじめまして、セキュリティエンジニアのSatoki (@satoki00) です。今回はブラウザの開発者ツールのネットワークタブから隠れて、Webサイト内の情報を送信する手法をまとめます。所謂Exfiltrationというやつです。中にはCSPの制限をBypassするために用いられるテクニックもあります。CTFなどで安全に使ってください。前提発端はWeb上でテキストの文字数をカウントできるサイトが閉鎖する際の話です。カウント対象のテキストデータがサイト運営 (やサイトを改竄した攻撃者) に盗み取られていないかという議論が巻</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF" data-gtm-click-label="entry-search-result-item-tag">ネットワーク</a></li> <li><a href="/q/%E3%83%96%E3%83%A9%E3%82%A6%E3%82%B6" data-gtm-click-label="entry-search-result-item-tag">ブラウザ</a></li> <li><a href="/q/%E3%82%BB%E3%82%AD%E3%83%A5%E3%83%AA%E3%83%86%E3%82%A3" data-gtm-click-label="entry-search-result-item-tag">セキュリティ</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/security" data-gtm-click-label="entry-search-result-item-tag">security</a></li> <li><a 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zenn.dev/headwaters </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2024/03/10</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">目的アプリケーションが通信に失敗した際のテストを行いたい例. 「通信に失敗した場合に再取得ボタンが表示されること」など方法1. Chrome DevTools を使う https://developer.chrome.com/docs/devtools/network/reference?hl=ja#throttling 任意の設定を追加して使用することができるメリット PCとモバイルデバイスの両方で使用可能新規にアプリケーションをインストールする必要が無いデメリットパケロス率などを設定できない Android, iOS のネイティブアプリでは使用できない方法2. Network Link Conditioner を使用する Network Link Conditioner は Apple が提供しているネットワークユーティリティツール使用手順等は以下のサイトが分かりやす</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/%E3%83%8D%E3%83%83%E3%83%88%E3%83%AF%E3%83%BC%E3%82%AF" data-gtm-click-label="entry-search-result-item-tag">ネットワーク</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/network" data-gtm-click-label="entry-search-result-item-tag">network</a></li> <li><a href="/q/%E3%83%86%E3%82%B9%E3%83%88" data-gtm-click-label="entry-search-result-item-tag">テスト</a></li> <li><a href="/q/test" data-gtm-click-label="entry-search-result-item-tag">test</a></li> <li><a href="/q/Android" data-gtm-click-label="entry-search-result-item-tag">Android</a></li> <li><a href="/q/ios" data-gtm-click-label="entry-search-result-item-tag">ios</a></li> <li><a href="/q/%E9%96%8B%E7%99%BA" data-gtm-click-label="entry-search-result-item-tag">開発</a></li> <li><a href="/q/%E7%92%B0%E5%A2%83" data-gtm-click-label="entry-search-result-item-tag">環境</a></li> <li><a href="/q/%E9%80%9A%E4%BF%A1" data-gtm-click-label="entry-search-result-item-tag">通信</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://zenn.dev/headwaters/articles/simulate-a-slow-network-environment"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul 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data-gtm-click-label="entry-search-result-item-tag">debug</a></li> <li><a href="/q/js" data-gtm-click-label="entry-search-result-item-tag">js</a></li> <li><a href="/q/development" data-gtm-click-label="entry-search-result-item-tag">development</a></li> <li><a href="/q/programming" data-gtm-click-label="entry-search-result-item-tag">programming</a></li> <li><a href="/q/%E3%82%A2%E3%82%AF%E3%82%BB%E3%82%B9" data-gtm-click-label="entry-search-result-item-tag">アクセス</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://qiita.com/gen_abe/items/185445cc0f9f326eee72"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span 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href="/q/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0" data-gtm-click-label="entry-search-result-item-tag">プログラミング</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://posfie.com/@clockmaker/p/oKM4EEy"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://posfie.com/@clockmaker/p/oKM4EEy" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/551c3865d92184629c47d8d7ed35951462173a27/height=288;version=1;width=512/https%3A%2F%2Fs.tgstc.com%2Fogp3%2Fcb8f1a3f3fbb621627f5bf628f408105-1200x630.jpeg" alt="ChromeのDevToolsの便利機能まとめ" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://blog.jxck.io/entries/2021-08-20/how-to-debug-mouseover.html"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://blog.jxck.io/entries/2021-08-20/how-to-debug-mouseover.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fblog.jxck.io%2Fentries%2F2021-08-20%2Fhow-to-debug-mouseover.html" alt="">mouseover 中に表示される DOM のデバッグ | blog.jxck.io </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/blog.jxck.io/entries/2021-08-20/how-to-debug-mouseover.html" class="js-keyboard-entry-page-openable" title="mouseover 中に表示される DOM のデバッグ | blog.jxck.io (268 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 268 users </a> </span> </li> <li> <a href="/site/blog.jxck.io/" title="『blog.jxck.io』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> blog.jxck.io </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2021/08/20</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Update 2024-03-30: Chrome 123 から "Emulate a focused page" が追加された。これを用いれば良いため、以降の全ての方式は古くなった。 Apply other effects: enable automatic dark theme, emulate focus, and more https://developer.chrome.com/docs/devtools/rendering/apply-effects#emulate_a_focused_page マウスが乗ってないと出ない UI も、そこに Tab などでフォーカスを移し、その状態で Dev Tools の "Emulate a focused page" を有効にすれば良い。 Intro 先日、後輩が「mouseover 中にしか表示されない DOM のデバッグ」に手こずっ</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/javascript" data-gtm-click-label="entry-search-result-item-tag">javascript</a></li> <li><a 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class="centerarticle-entry-summary">ウェブアプリケーションの開発においてE2Eテストの自動化は身近なトピックです。SeleniumやPuppetter、PlaywrightやAppiumなどがブラウザ・ネイティブアプリの自動操作のOSSとしてよく挙げられます。しかし、それらの裏側はご存知でしょうか？本トークではこれらのツールの背後…</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/selenium" data-gtm-click-label="entry-search-result-item-tag">selenium</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/%E3%83%96%E3%83%A9%E3%82%A6%E3%82%B6" data-gtm-click-label="entry-search-result-item-tag">ブラウザ</a></li> <li><a href="/q/webdriver" data-gtm-click-label="entry-search-result-item-tag">webdriver</a></li> <li><a href="/q/%E3%83%86%E3%82%B9%E3%83%88" data-gtm-click-label="entry-search-result-item-tag">テスト</a></li> <li><a href="/q/browser" data-gtm-click-label="entry-search-result-item-tag">browser</a></li> <li><a href="/q/%E6%8A%80%E8%A1%93" data-gtm-click-label="entry-search-result-item-tag">技術</a></li> <li><a href="/q/testing" data-gtm-click-label="entry-search-result-item-tag">testing</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://speakerdeck.com/hgsgtk/webdriver-cdp-using-php"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span 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readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://developer.chrome.com/docs/devtools/recorder"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://developer.chrome.com/docs/devtools/recorder" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fdeveloper.chrome.com%2Fdocs%2Fdevtools%2Frecorder" alt="">Record, replay, and measure user flows | Chrome DevTools | Chrome for Developers </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/developer.chrome.com/docs/devtools/recorder" class="js-keyboard-entry-page-openable" title="Record, replay, and measure user flows | Chrome DevTools | Chrome for Developers (182 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 182 users </a> </span> </li> <li> <a href="/site/developer.chrome.com/" title="『developer.chrome.com』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> developer.chrome.com </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2021/11/04</span></li> </ul> </div> <div class="centerarticle-entry-contents "> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Take a glance at the new Recorder panel (preview feature) with the video below. Complete this tutorial to learn how to use the Recorder panel to record, replay, and measure user flows. For more information on how to share the recorded user flows, edit them and their steps, see the Recorder features reference. Open the Recorder panel Open DevTools. Click on More options > More tools > Recorder.</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/performance" data-gtm-click-label="entry-search-result-item-tag">performance</a></li> <li><a href="/q/%E3%83%91%E3%83%95%E3%82%A9%E3%83%BC%E3%83%9E%E3%83%B3%E3%82%B9" data-gtm-click-label="entry-search-result-item-tag">パフォーマンス</a></li> <li><a href="/q/%E9%96%8B%E7%99%BA" data-gtm-click-label="entry-search-result-item-tag">開発</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://developer.chrome.com/docs/devtools/recorder"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://www.publickey1.jp/blog/24/googlegeminiwebideproject_idx.html"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://www.publickey1.jp/blog/24/googlegeminiwebideproject_idx.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fwww.publickey1.jp%2Fblog%2F24%2Fgooglegeminiwebideproject_idx.html" alt="">［速報］Google、Geminiベースの新WebIDE「Project IDX」をオープンベータで公開 </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/www.publickey1.jp/blog/24/googlegeminiwebideproject_idx.html" class="js-keyboard-entry-page-openable" title="［速報］Google、Geminiベースの新WebIDE「Project IDX」をオープンベータで公開 (177 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 177 users </a> </span> </li> <li> <a href="/site/www.publickey1.jp/" title="『www.publickey1.jp』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> www.publickey1.jp </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2024/05/15</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">［速報］Google、Geminiベースの新WebIDE「Project IDX」をオープンベータで公開 Googleは同社の最新生成AIであるGeminiをベースとした新しいWeb IDE「Project IDX」をオープンベータとして公開しました。 Project IDXは、モバイルやデスクトップなどのマルチプラットフォームに対応したフルスタックのWebアプリケーションを、さまざまなフレームワークや生成的AIの支援などを活用して効率的に開発するための、Webブラウザから利用可能な統合開発環境です。これまでその存在は発表されていましたが、招待されたユーザーのみが利用可能でした。 We want to make generative AI accessible to every developer on the planet. That’s why we’re making Gemini</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/AI" data-gtm-click-label="entry-search-result-item-tag">AI</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/google" data-gtm-click-label="entry-search-result-item-tag">google</a></li> <li><a href="/q/%E9%96%8B%E7%99%BA" data-gtm-click-label="entry-search-result-item-tag">開発</a></li> <li><a href="/q/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0" data-gtm-click-label="entry-search-result-item-tag">プログラミング</a></li> <li><a href="/q/%E4%BA%BA%E5%B7%A5%E7%9F%A5%E8%83%BD" data-gtm-click-label="entry-search-result-item-tag">人工知能</a></li> <li><a href="/q/%E3%82%BD%E3%83%95%E3%83%88%E3%82%A6%E3%82%A7%E3%82%A2" data-gtm-click-label="entry-search-result-item-tag">ソフトウェア</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" 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class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/8438c3438b794040be5432db0fc072a04b0cb2c3/height=288;version=1;width=512/https%3A%2F%2Fwww.publickey1.jp%2F2024%2Fproject-idx-openbeta01.png" alt="［速報］Google、Geminiベースの新WebIDE「Project IDX」をオープンベータで公開" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://www.publickey1.jp/blog/24/chrome_devtoolsgeminiai.html"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://www.publickey1.jp/blog/24/chrome_devtoolsgeminiai.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fwww.publickey1.jp%2Fblog%2F24%2Fchrome_devtoolsgeminiai.html" alt="">Chrome DevToolsにもGeminiを搭載へ。エラーの解決策などAIが支援 </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/www.publickey1.jp/blog/24/chrome_devtoolsgeminiai.html" class="js-keyboard-entry-page-openable" title="Chrome DevToolsにもGeminiを搭載へ。エラーの解決策などAIが支援 (171 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 171 users </a> </span> </li> <li> <a href="/site/www.publickey1.jp/" title="『www.publickey1.jp』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> www.publickey1.jp </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2024/05/16</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Googleは、日本時間5月15日から開催中のイベント「Google I/O 2024」で、デスクトップ版のChromeが備える開発ツール「Chrome DevTools」に、同社の最新版の生成AIであるGeminiを組み込むと発表しました。これによりDevToolsのコンソールで表示されるエラーメッセージなどをGeminiが解説し、エラーの解決などを支援してくれるようになります。 DevToolsのエラーをGeminiが解決下記がGoogle I/Oのデベロッパー向け基調講演で行われたデモ画面の一部です。DevToolsに表示されたエラーに関して、右上の「Understand this error」ボタンをクリックすると、このエラーがGeminiに送られます。</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/AI" data-gtm-click-label="entry-search-result-item-tag">AI</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/gemini" data-gtm-click-label="entry-search-result-item-tag">gemini</a></li> <li><a href="/q/google" data-gtm-click-label="entry-search-result-item-tag">google</a></li> <li><a href="/q/%22google%20chrome%22" data-gtm-click-label="entry-search-result-item-tag">google chrome</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/%E4%BA%BA%E5%B7%A5%E7%9F%A5%E8%83%BD" data-gtm-click-label="entry-search-result-item-tag">人工知能</a></li> <li><a href="/q/%E3%82%BD%E3%83%95%E3%83%88%E3%82%A6%E3%82%A7%E3%82%A2" data-gtm-click-label="entry-search-result-item-tag">ソフトウェア</a></li> <li><a href="/q/software" data-gtm-click-label="entry-search-result-item-tag">software</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://www.publickey1.jp/blog/24/chrome_devtoolsgeminiai.html"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://www.publickey1.jp/blog/24/chrome_devtoolsgeminiai.html" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/9ded1a75d964725664372996eab5b73ae9370091/height=288;version=1;width=512/https%3A%2F%2Fwww.publickey1.jp%2F2024%2Fdevtools-gemini01.png" alt="Chrome DevToolsにもGeminiを搭載へ。エラーの解決策などAIが支援" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://toranoana-lab.hatenablog.com/entry/2021/11/18/121835"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://toranoana-lab.hatenablog.com/entry/2021/11/18/121835" class="js-clickable-link 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class="entry-contents-date">2021/11/18</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">こんにちは。虎の穴ラボのH.Hです。今回は先日発表されたChromeの開発中の新機能であるRecorder機能について使用方法や利用する際の注意点などをまとめました。 Recoder機能とはブラウザのChrome97で追加される予定の機能で、ブラウザの画面上で操作した記録を取得してくれる機能になります。この記事を書いている2021年11月17日では一般に提供されているChromeの最新版は96となり、開発中の「Chrome Dev」もしくは「Chrome Canary」でRecorder機能を使用することができます。利用している時の様子はChromeの開発者向けのページに公開されています。 developer.chrome.com 主な機能は以下の通りです。・操作の記録及び再実行(リプレイ)できる・再実行時にパフォーマンスの記録・確認できる・記録した内容の編集ができる・操作</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/Puppeteer" data-gtm-click-label="entry-search-result-item-tag">Puppeteer</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/%E9%96%8B%E7%99%BA" 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DevTools: Record tests with the puppeteer recorder Last updated: 25th November 2020 Introduction The Puppeteer Recorder feature in Chrome DevTools can monitor your webpage interactions and generate the code to automate a browser. For example, if you click on an element and type an email address into an email field, the recorder can generate the following code: await page.click("aria/Login")</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/puppeteer" data-gtm-click-label="entry-search-result-item-tag">puppeteer</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/%E3%83%86%E3%82%B9%E3%83%88" data-gtm-click-label="entry-search-result-item-tag">テスト</a></li> <li><a href="/q/test" data-gtm-click-label="entry-search-result-item-tag">test</a></li> <li><a href="/q/development" data-gtm-click-label="entry-search-result-item-tag">development</a></li> <li><a href="/q/testing" data-gtm-click-label="entry-search-result-item-tag">testing</a></li> <li><a href="/q/dev" data-gtm-click-label="entry-search-result-item-tag">dev</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://umaar.com/dev-tips/241-puppeteer-recorder/"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://addyosmani.com/blog/puppeteer-recipes/"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://addyosmani.com/blog/puppeteer-recipes/" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Faddyosmani.com%2Fblog%2Fpuppeteer-recipes%2F" alt="">Web Performance Recipes With Puppeteer </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/addyosmani.com/blog/puppeteer-recipes/" class="js-keyboard-entry-page-openable" title="Web Performance Recipes With Puppeteer (106 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 106 users </a> </span> </li> <li> <a href="/site/addyosmani.com/" title="『addyosmani.com』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> addyosmani.com </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2020/07/12</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">🕹 Puppeteer is a Node library which provides a high-level API to control headless Chrome or Chromium over the DevTools Protocol. This guide has recipes for automating Web Performance measurement with Puppeteer. An accompanying GitHub repository for this write-up is also available. Get a DevTools performance trace for a page load Puppeteer API: tracing.start() const puppeteer = require('puppeteer'</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/puppeteer" data-gtm-click-label="entry-search-result-item-tag">puppeteer</a></li> <li><a href="/q/performance" data-gtm-click-label="entry-search-result-item-tag">performance</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/%E3%83%91%E3%83%95%E3%82%A9%E3%83%BC%E3%83%9E%E3%83%B3%E3%82%B9" data-gtm-click-label="entry-search-result-item-tag">パフォーマンス</a></li> <li><a href="/q/web" data-gtm-click-label="entry-search-result-item-tag">web</a></li> <li><a href="/q/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0" data-gtm-click-label="entry-search-result-item-tag">プログラミング</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" 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<img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/35a9c7d032fa7b303a5e74fdb8e4aed7d9b1438a/height=288;version=1;width=512/https%3A%2F%2Faddyosmani.com%2Fassets%2Fimages%2Fpuppeteer-webperf.jpg" alt="Web Performance Recipes With Puppeteer" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fmotemen.hatenablog.com%2Fentry%2F2022%2F03%2Fchrome-extension-esbuild" alt="">DevTools上でesbuildするChrome拡張を書いた - 詩と創作・思索のひろば </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild" class="js-keyboard-entry-page-openable" title="DevTools上でesbuildするChrome拡張を書いた - 詩と創作・思索のひろば (100 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 100 users </a> </span> </li> <li> <a href="/site/motemen.hatenablog.com/" title="『motemen.hatenablog.com』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> motemen.hatenablog.com </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2022/03/01</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">社内ではドキュメントの共有に Scrapbox が活発に使われており、するといきおい UserCSS や UserScript もさかんである。具体的には、/customize という共有のプロジェクトがあってみんなの自慢の装飾やカスタマイズが共有されている。これを個々人で import して使うんである。こんな感じ。自分の場合は /motemen/UserCSS/common に常に適用したいスタイルを書いておいて各プロジェクトから読み込んでいる。このページからさらに、共有プロジェクトや他人の個人プロジェクトページからよさそうな設定を import している次第。つまりは多段インポート。こういうことを続けていると、だんだんと読み込みの遅さが気になってくる。こういうのはバンドルすればいいのだけど、巷のツールを普通に使うことはできない。インポートしてるリソースに認証がかかっているからだ</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/WebAssembly" data-gtm-click-label="entry-search-result-item-tag">WebAssembly</a></li> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/esbuild" data-gtm-click-label="entry-search-result-item-tag">esbuild</a></li> <li><a href="/q/ChromeDevTools" data-gtm-click-label="entry-search-result-item-tag">ChromeDevTools</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/javascript" data-gtm-click-label="entry-search-result-item-tag">javascript</a></li> <li><a href="/q/%22Google%20Chrome%22" data-gtm-click-label="entry-search-result-item-tag">Google Chrome</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://motemen.hatenablog.com/entry/2022/03/chrome-extension-esbuild"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" 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BreakpointsPropertiesAccessibilityConsoleメッセージスタッキングコンソールの履歴実行コンテキストの選択コンソール出力のフィルタリングコンソールの設定Sourcesコード行ブレークポイント条件付きコード行ブレークポイントコード行ブレークポイントの管理DOM 変更ブレークポイントXHR ブレークポイントイベントリスナーブレークポイント例外ブレークポイント関数ブレークポイントNetworkネットワークリクエストの記録読み込み動作の変更リクエストのフィルタリングリクエストの並び替えリクエストの分析リクエストデータのファイル出力Performance概要ペインフレームチャートペイン詳細ペインMemoryHeap snapshotAllocation inst</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/devtool" data-gtm-click-label="entry-search-result-item-tag">devtool</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/%E3%83%84%E3%83%BC%E3%83%AB" data-gtm-click-label="entry-search-result-item-tag">ツール</a></li> <li><a href="/q/%E3%83%91%E3%83%95%E3%82%A9%E3%83%BC%E3%83%9E%E3%83%B3%E3%82%B9" data-gtm-click-label="entry-search-result-item-tag">パフォーマンス</a></li> <li><a href="/q/performance" data-gtm-click-label="entry-search-result-item-tag">performance</a></li> <li><a href="/q/css" data-gtm-click-label="entry-search-result-item-tag">css</a></li> <li><a href="/q/web%E5%88%B6%E4%BD%9C" data-gtm-click-label="entry-search-result-item-tag">web制作</a></li> <li><a href="/q/tool" data-gtm-click-label="entry-search-result-item-tag">tool</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://murashun.jp/article/performance/chrome-devtools.html"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://murashun.jp/article/performance/chrome-devtools.html" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/db8ef849a12a9a92fb6151f1720eef03cf5d0470/height=288;version=1;width=512/https%3A%2F%2Fmurashun.jp%2Fimg%2Fogp.png" alt="Chrome DevTools の使い方" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://polamjag.hatenablog.jp/entry/2021/12/22/100000"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://polamjag.hatenablog.jp/entry/2021/12/22/100000" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fpolamjag.hatenablog.jp%2Fentry%2F2021%2F12%2F22%2F100000" alt="">DevTools の Web 技術でできている部分を覗き見る - polamjaggy </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/polamjag.hatenablog.jp/entry/2021/12/22/100000" class="js-keyboard-entry-page-openable" title="DevTools の Web 技術でできている部分を覗き見る - polamjaggy (77 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 77 users </a> </span> </li> <li> <a href="/site/polamjag.hatenablog.jp/" title="『polamjag.hatenablog.jp』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> polamjag.hatenablog.jp </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2021/12/22</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">この記事ははてなエンジニア Advent Calendar 2021 の 22 日目の記事です。昨日の記事は id:shimobayashi さんのアジャイル推進活動にここ1年で吉兆がみえてきた要因について - 下林明正のブログでした。 Chrome の DevTools の UI 部分は Web 技術でできています。Web 技術でできているので、DevTools を DevTools で inspect することもできます。 example.com を inspect している画面を inspect している様子このことを知ったのは、10MB くらいある JavaScript ファイルにブレークポイントを貼りつつデバッグしていたら DevTools が固まるようになってしまい、ブレークポイントを解除しようにもその前に DevTools がフリーズしてしまうので詰んだ……、という出</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/web" data-gtm-click-label="entry-search-result-item-tag">web</a></li> <li><a href="/q/JavaScript" data-gtm-click-label="entry-search-result-item-tag">JavaScript</a></li> <li><a href="/q/browser" data-gtm-click-label="entry-search-result-item-tag">browser</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://polamjag.hatenablog.jp/entry/2021/12/22/100000"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://polamjag.hatenablog.jp/entry/2021/12/22/100000" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/f5e3497e7d2933d962d13bfe0ca33844aa241455/height=288;version=1;width=512/https%3A%2F%2Fcdn-ak.f.st-hatena.com%2Fimages%2Ffotolife%2Fp%2Fpolamjag%2F20211222%2F20211222005603.png" alt="DevTools の Web 技術でできている部分を覗き見る - polamjaggy" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://dev.classmethod.jp/articles/google-chrome-devtools-vision-deficiencies/"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://dev.classmethod.jp/articles/google-chrome-devtools-vision-deficiencies/" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fdev.classmethod.jp%2Farticles%2Fgoogle-chrome-devtools-vision-deficiencies%2F" alt="">色覚多様性(色覚異常)の見え方を Chrome DevTools でシミュレーションする | DevelopersIO </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/dev.classmethod.jp/articles/google-chrome-devtools-vision-deficiencies/" class="js-keyboard-entry-page-openable" title="色覚多様性(色覚異常)の見え方を Chrome DevTools でシミュレーションする | DevelopersIO (66 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 66 users </a> </span> </li> <li> <a href="/site/dev.classmethod.jp/" title="『dev.classmethod.jp』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> dev.classmethod.jp </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2021/03/23</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">去年にアップデートされた Chorome 83 以降、拡張やアプリなどを導入することなく、DevTools で簡単にシミュレートすることが可能になっています。手順 DevTools のメニューを開きます。 More tools から Rendering を選択します。あとは Emulate vision deficiencies で選択するだけです。シミュレーションできる種類実際に DevelopersIO のロゴがどう見えるのか、それぞれの選択肢でどうみえるようになるのか確認してみました。選択肢名サンプル画像</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/%E8%89%B2%E8%A6%9A%E7%95%B0%E5%B8%B8" data-gtm-click-label="entry-search-result-item-tag">色覚異常</a></li> <li><a href="/q/%E9%85%8D%E8%89%B2" data-gtm-click-label="entry-search-result-item-tag">配色</a></li> <li><a href="/q/web%E5%88%B6%E4%BD%9C" data-gtm-click-label="entry-search-result-item-tag">web制作</a></li> <li><a href="/q/%E3%82%A2%E3%82%AF%E3%82%BB%E3%82%B7%E3%83%93%E3%83%AA%E3%83%86%E3%82%A3" data-gtm-click-label="entry-search-result-item-tag">アクセシビリティ</a></li> <li><a href="/q/accessibility" data-gtm-click-label="entry-search-result-item-tag">accessibility</a></li> <li><a href="/q/color" data-gtm-click-label="entry-search-result-item-tag">color</a></li> <li><a href="/q/%E3%83%87%E3%82%B6%E3%82%A4%E3%83%B3" data-gtm-click-label="entry-search-result-item-tag">デザイン</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://dev.classmethod.jp/articles/google-chrome-devtools-vision-deficiencies/"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://dev.classmethod.jp/articles/google-chrome-devtools-vision-deficiencies/" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/bedd873f740a5571b2a127355297e65d6e96d163/height=288;version=1;width=512/https%3A%2F%2Fdevio2023-media.developers.io%2Fwp-content%2Fuploads%2F2019%2F07%2Fgoogle-chrome-eyecatch.jpg" alt="色覚多様性(色覚異常)の見え方を Chrome DevTools でシミュレーションする | DevelopersIO" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://www.mitsue.co.jp/knowledge/blog/frontend/202107/28_1056.html"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://www.mitsue.co.jp/knowledge/blog/frontend/202107/28_1056.html" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fwww.mitsue.co.jp%2Fknowledge%2Fblog%2Ffrontend%2F202107%2F28_1056.html" alt="">Chrome DevToolsのRenderingタブを活用しよう | フロントエンドBlog | ミツエーリンクス </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/www.mitsue.co.jp/knowledge/blog/frontend/202107/28_1056.html" class="js-keyboard-entry-page-openable" title="Chrome DevToolsのRenderingタブを活用しよう | フロントエンドBlog | ミツエーリンクス (60 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 60 users </a> </span> </li> <li> <a href="/site/www.mitsue.co.jp/" title="『www.mitsue.co.jp』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> www.mitsue.co.jp </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2021/07/28</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">Chrome DevToolsにはさまざまな機能が搭載されています。そのうちの1つ「Rendering」には、ページのレンダリングパフォーマンスを視覚化する機能や、さまざまな見え方を疑似的に再現する機能が含まれています。サイトのレンダリングパフォーマンス改善の取り組みに活用できる、こちらのRenderingタブ内の各機能についてご紹介します。利用方法と各機能について Renderingタブはデフォルトだと非表示になっており、利用するにはまず次のいずれかの方法で表示する必要があります。 Chrome DevToolsを開いた状態でWindowsではCtrl+Shift+P、MacではCommand+Shift+Pを押して表示されるコマンドメニューに「Rendering」と入力し、「Show Rendering」を選択 Chrome DevTools内の三点ドットから「More tools</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/chrome" data-gtm-click-label="entry-search-result-item-tag">chrome</a></li> <li><a href="/q/debug" data-gtm-click-label="entry-search-result-item-tag">debug</a></li> <li><a href="/q/devtools" data-gtm-click-label="entry-search-result-item-tag">devtools</a></li> <li><a href="/q/web%E5%88%B6%E4%BD%9C" data-gtm-click-label="entry-search-result-item-tag">web制作</a></li> <li><a href="/q/accessibility" data-gtm-click-label="entry-search-result-item-tag">accessibility</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/browser" data-gtm-click-label="entry-search-result-item-tag">browser</a></li> <li><a href="/q/css" data-gtm-click-label="entry-search-result-item-tag">css</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" data-entry-url="https://www.mitsue.co.jp/knowledge/blog/frontend/202107/28_1056.html"> <ul class="following-bookmarks js-following-bookmarks"></ul> <script type="text/x-template" id="template-following-bookmark"> <li> <a href="{{ anchor_path }}" class="following-bookmark-link" data-gtm-label="entry-info-followingBookmarks"> <img src="{{ profile_image_url }}" alt="{{ user_name }}" class="following-bookmark-icon"> </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{ user_name }}</span><span class="following-bookmark-timestamp">{{ created }}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags">{{ #tags }}<li>{{ label }}</li>{{ /tags }}</ul> </span> </span> </li> </script> </div> </div> <div class="centerarticle-entry-image-wrapper"> <a href="https://www.mitsue.co.jp/knowledge/blog/frontend/202107/28_1056.html" class="centerarticle-entry-image" target="_blank" rel="noopener"> <img src="https://cdn-ak-scissors.b.st-hatena.com/image/square/1b18662aae3f5c41897c0692bf299b1d8d113c2c/height=288;version=1;width=512/https%3A%2F%2Fwww.mitsue.co.jp%2Fknowledge%2Fblog%2Ffrontend%2Fimg%2F20210706_07.gif" alt="Chrome DevToolsのRenderingタブを活用しよう | フロントエンドBlog | ミツエーリンクス" data-gtm-click-label="entry-search-result-item-image"> </a> </div> </div> </div> </li> <li class="bookmark-item js-user-bookmark-item js-keyboard-selectable-item"> <div class="centerarticle-entry is-image-entry-unit"> <div class="js-bookmark-stock-button is-hidden"> <button class="js-bookmark-stock-button-ready readlater-button" data-gtm-click-label="entry-search-result-item-stock-button" title="あとで読む" aria-label="あとで読む" tabindex="0" type="button" data-href="https://dev.classmethod.jp/articles/react-developer-tools/"><span>あとで読む</span> </button> </div> <div class="centerarticle-entry-header"> <h3 class="centerarticle-entry-title"> <a href="https://dev.classmethod.jp/articles/react-developer-tools/" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="entry-search-result-item-title"> <img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fdev.classmethod.jp%2Farticles%2Freact-developer-tools%2F" alt="">React Developer Toolsでレンダリングを可視化する | DevelopersIO </a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/dev.classmethod.jp/articles/react-developer-tools/" class="js-keyboard-entry-page-openable" title="React Developer Toolsでレンダリングを可視化する | DevelopersIO (59 ブックマーク)" data-gtm-click-label="entry-search-result-item-users"> 59 users </a> </span> </li> <li> <a href="/site/dev.classmethod.jp/" title="『dev.classmethod.jp』の新着エントリー" data-gtm-click-label="entry-search-result-item-site-search-url"> dev.classmethod.jp </a> </li> <li> <a href="/hotentry/it" data-gtm-click-label="entry-search-result-item-category">テクノロジー</a> </li> <li><span class="entry-contents-date">2022/04/19</span></li> </ul> </div> <div class="centerarticle-entry-contents has-image"> <div class="centerarticle-entry-item"> <p class="centerarticle-entry-summary">こんにちは。データアナリティクス事業本部サービスソリューション部の北川です。 React Developer Toolsは、React用開発ツールです。Reactの開発元であるMetaが提供しています。結構有名ですが、まだ使ったことがない人に向け、簡単に書いていきます。 React Developer Toolsの使い方拡張機能を追加します。 https://chrome.google.com/webstore/detail/react-developer-tools/fmkadmapgofadopljbjfkapdkoienihi アイコンが追加されていることを確認します。通常のReactページで使用する場合、アイコンは青いですが、開発環境ではアイコンの色が赤くなります。ローカル環境で使用するために、拡張機能の一覧から、React Developer Toolsの「拡張機能を管理</p> <ul class="entrysearch-entry-tags"> <li><a href="/q/react" data-gtm-click-label="entry-search-result-item-tag">react</a></li> <li><a href="/q/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80" data-gtm-click-label="entry-search-result-item-tag">あとで読む</a></li> <li><a href="/q/tool" data-gtm-click-label="entry-search-result-item-tag">tool</a></li> <li><a href="/q/Chrome" data-gtm-click-label="entry-search-result-item-tag">Chrome</a></li> <li><a href="/q/techfeed" data-gtm-click-label="entry-search-result-item-tag">techfeed</a></li> <li><a href="/q/%E3%83%84%E3%83%BC%E3%83%AB" data-gtm-click-label="entry-search-result-item-tag">ツール</a></li> </ul> <div class="following-bookmarks-container js-following-bookmarks-container" 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