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<title data-rh="true">CDPSession class | Puppeteer</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://pptr.dev/api/puppeteer.cdpsession"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="19.3.0"><meta data-rh="true" name="docusaurus_tag" content="docs-default-19.3.0"><meta data-rh="true" name="docsearch:version" content="19.3.0"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-19.3.0"><meta data-rh="true" property="og:title" content="CDPSession class | Puppeteer"><meta data-rh="true" name="description" content="The CDPSession instances are used to talk raw Chrome Devtools Protocol."><meta data-rh="true" property="og:description" content="The CDPSession instances are used to talk raw Chrome Devtools Protocol."><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://pptr.dev/api/puppeteer.cdpsession"><link data-rh="true" rel="alternate" href="https://pptr.dev/api/puppeteer.cdpsession" hreflang="en"><link data-rh="true" rel="alternate" href="https://pptr.dev/api/puppeteer.cdpsession" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://DVKY664LG7-dsn.algolia.net" crossorigin="anonymous"><link rel="search" type="application/opensearchdescription+xml" title="Puppeteer" href="/opensearch.xml"><link rel="stylesheet" href="/assets/css/styles.b357ffad.css">
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.55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">CDPSession</span><meta itemprop="position" content="1"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 19.3.0</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>CDPSession class</h1><p>The <code>CDPSession</code> instances are used to talk raw Chrome Devtools Protocol.</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="signature">Signature:<a class="hash-link" href="#signature" title="Direct link to heading"></a></h4><div class="language-typescript codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-typescript codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">export</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">declare</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">class</span><span class="token plain"> </span><span class="token class-name">CDPSession</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">extends</span><span class="token plain"> </span><span class="token class-name">EventEmitter</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p><strong>Extends:</strong> <a href="/api/puppeteer.eventemitter">EventEmitter</a></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="remarks">Remarks<a class="hash-link" href="#remarks" title="Direct link to heading"></a></h2><p>Protocol methods can be called with <a href="/api/puppeteer.cdpsession.send">CDPSession.send()</a> method and protocol events can be subscribed to with <code>CDPSession.on</code> method.</p><p>Useful links: <a href="https://chromedevtools.github.io/devtools-protocol/" target="_blank" rel="noopener noreferrer">DevTools Protocol Viewer</a> and <a href="https://github.com/aslushnikov/getting-started-with-cdp/blob/HEAD/README.md" target="_blank" rel="noopener noreferrer">Getting Started with DevTools Protocol</a>.</p><p>The constructor for this class is marked as internal. Third-party code should not call the constructor directly or create subclasses that extend the <code>CDPSession</code> class.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="example">Example<a class="hash-link" href="#example" title="Direct link to heading"></a></h2><div class="language-ts codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-ts codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> client </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">await</span><span class="token plain"> page</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">target</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">createCDPSession</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">await</span><span class="token plain"> client</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">send</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">'Animation.enable'</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">client</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">on</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">'Animation.animationCreated'</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">=></span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">log</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">'Animation created!'</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> response </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">await</span><span class="token plain"> client</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">send</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">'Animation.getPlaybackRate'</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">log</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">'playback rate is '</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">+</span><span class="token plain"> response</span><span class="token punctuation" style="color:#393A34">.</span><span class="token plain">playbackRate</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#00009f">await</span><span class="token plain"> client</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#d73a49">send</span><span class="token punctuation" style="color:#393A34">(</span><span class="token string" style="color:#e3116c">'Animation.setPlaybackRate'</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> playbackRate</span><span class="token operator" style="color:#393A34">:</span><span class="token plain"> response</span><span class="token punctuation" style="color:#393A34">.</span><span class="token plain">playbackRate </span><span class="token operator" style="color:#393A34">/</span><span class="token plain"> </span><span class="token number" style="color:#36acaa">2</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">}</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg class="copyButtonIcon_y97N" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="methods">Methods<a class="hash-link" href="#methods" title="Direct link to heading"></a></h2><table><thead><tr><th>Method</th><th>Modifiers</th><th>Description</th></tr></thead><tbody><tr><td><a href="/api/puppeteer.cdpsession.connection">connection()</a></td><td></td><td></td></tr><tr><td><a href="/api/puppeteer.cdpsession.detach">detach()</a></td><td></td><td>Detaches the cdpSession from the target. Once detached, the cdpSession object won't emit any events and can't be used to send messages.</td></tr><tr><td><a href="/api/puppeteer.cdpsession.id">id()</a></td><td></td><td>Returns the session's id.</td></tr><tr><td><a href="/api/puppeteer.cdpsession.send">send(method, paramArgs)</a></td><td></td><td></td></tr></tbody></table></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages navigation"><a class="pagination-nav__link pagination-nav__link--prev" href="/api/puppeteer.target.worker"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Target.worker</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/api/puppeteer.cdpsession.connection"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">CDPSession.connection</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#remarks" class="table-of-contents__link toc-highlight">Remarks</a></li><li><a href="#example" class="table-of-contents__link toc-highlight">Example</a></li><li><a href="#methods" class="table-of-contents__link toc-highlight">Methods</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Community</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://stackoverflow.com/questions/tagged/puppeteer" target="_blank" rel="noopener noreferrer" class="footer__link-item">Stack Overflow<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://twitter.com/chromedevtools" target="_blank" rel="noopener noreferrer" class="footer__link-item">Twitter<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://goo.gle/devtools-youtube" target="_blank" rel="noopener noreferrer" class="footer__link-item">YouTube<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><div class="footer__bottom text--center"><div class="footer__copyright">Copyright © 2022 Google, Inc.</div></div></div></footer></div>
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