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Request.clone

The clone() method of the Request interface creates a copy of the current Request object.

clone() throws a TypeError if the response Body has already been used. In fact, the main reason clone() exists is to allow multiple uses of Body objects (when they are one-use only.)

Syntax

var newRequest = request.clone();

Parameters

None.

Return value

A Request object, which is an exact copy of the Request that clone() was called on.

Example

In the following snippet, we create a new request using the Request.Request() constructor (for an image file in the same directory as the script), then clone the request.

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

Specifications

Specification Status Comment
Fetch
The definition of 'clone' in that specification.
Living Standard Initial definition

Browser compatibilityUpdate compatibility data on GitHub

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

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/Request/clone