# class:tracing ### class: Tracing v0.9.0 你可以使用 [`tracing.start`](#?product=Puppeteer&version=v1.11.0&show=api-tracingstartoptions) 和 [`tracing.stop`](#?product=Puppeteer&version=v1.11.0&show=api-tracingstop) 創建一個可以在 Chrome DevTools or [timeline viewer](https://chromedevtools.github.io/timeline-viewer/) 中打開的跟蹤文件。 ``` await page.tracing.start({path: 'trace.json'});await page.goto('https://www.google.com');await page.tracing.stop(); ``` #### Methods - [tracing.start(options)](#?product=Puppeteer&version=v1.11.0&show=api-tracingstartoptions)v0.9.0 - [tracing.stop()](#?product=Puppeteer&version=v1.11.0&show=api-tracingstop)v0.9.0 ### Methods #### tracing.start(options)v0.9.0 - `options` <[Object](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object "Object")> - `path` <[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type "String")> 跟蹤文件寫入的路徑 - `screenshots` <[boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type "Boolean")> 捕獲跟蹤中的屏幕截圖 - `categories` <[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array "Array")<[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type "String")>> 指定要使用的自定義類別替換默認值 - returns: <[Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise "Promise")> 每個瀏覽器一次只能激活一條跟蹤。 #### tracing.stop()v0.9.0 - returns: <[Promise](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise "Promise")<[Buffer](https://nodejs.org/api/buffer.html#buffer_class_buffer "Buffer")>> Promise which resolves to buffer with trace data.  puppeteer.js中文網|class:tracing 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。