Request.clone()

Request 接口中的clone() 方法可以创建一个当前Request 对象的副本。

如果响应体Body已经被使用过，那么clone()会抛出一个TypeError。实际上，clone() 的主要作用就是支持Body对象的多次使用

语法

var newRequest = request.clone();

无。

Request对象，也就是Request的完整拷贝

在下面的代码中，我们使用Request.Request()构造函数创建了一个新的request对象(请求当前文件夹中的一个图片文件)，然后拷贝了这个request对象。

var myRequest = new Request('flowers.jpg');
var newRequest = myRequest.clone(); // a copy of the request is now stored in newRequest

规范	状态	说明
Fetch clone	Living Standard	初始化定义

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`clone` Experimental	Chrome Full support 42 Full support 42 Full support 41 Disabled Disabled From version 41: this feature is behind the `Experimental Web Platform Features` preference. To change preferences in Chrome, visit chrome://flags.	Edge Full support 14	Firefox Full support 39 Full support 39 Full support 34 Disabled Disabled From version 34: this feature is behind the `dom.fetch.enabled` preference. To change preferences in Firefox, visit about:config.	IE No support No	Opera Full support 29 Full support 29 Full support 28 Disabled Disabled From version 28: this feature is behind the `Experimental Web Platform Features` preference.	Safari Full support 10.1	WebView Android No support No	Chrome Android No support No	Firefox Android No support No	Opera Android Full support 29 Full support 29 Full support 28 Disabled Disabled From version 28: this feature is behind the `Experimental Web Platform Features` preference.	Safari iOS Full support 10.3	Samsung Internet Android No support No

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.: User must explicitly enable this feature.