# class:cdpsession ### class: CDPSession v0.9.0 - extends: [`EventEmitter`](https://nodejs.org/api/events.html#events_class_eventemitter) `CDPSession` 實例用于與 Chrome Devtools 協議的原生通信： - 協議方法可以用 `session.send` 方法調用。 - 協議事件可以通過 `session.on` 方法訂閱。 DevTools Protocol 的文檔具體見這里: [DevTools Protocol Viewer](https://chromedevtools.github.io/devtools-protocol/). ``` const client = await page.target().createCDPSession();await client.send('Animation.enable');client.on('Animation.animationCreated', () => console.log('Animation created!'));const response = await client.send('Animation.getPlaybackRate');console.log('playback rate is ' + response.playbackRate);await client.send('Animation.setPlaybackRate', { playbackRate: response.playbackRate / 2}); ``` #### Methods - [cdpSession.detach()](#?product=Puppeteer&version=v1.11.0&show=api-cdpsessiondetach)v0.9.0 - [cdpSession.send(method\[, params\])](#?product=Puppeteer&version=v1.11.0&show=api-cdpsessionsendmethod-params)v0.9.0 ### Methods #### cdpSession.detach()v0.9.0 - returns: <[Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise "Promise")> 從目標中分離 cdpSession。 一旦分離，cdpSession 對象將不會觸發任何事件并且不能用于發送消息。 #### cdpSession.send(method\[, params\])v0.9.0 - `method` <[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type "String")> protocol method name - `params` <[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object "Object")> Optional method parameters - returns: <[Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise "Promise")<[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object "Object")>>  puppeteer.js中文網|class:cdpsession puppeteer.js中文文檔, puppeteer chrome, puppeteer firefox, puppeteer api 中文文檔 puppeteer.js中文網包含了Puppeteer中文文檔，最新資訊，應用案例等。Puppeteer 是一個 Node 庫，它提供了一個高級 API 來通過 DevTools 協議控制 Chromium 或 Chrome。