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 compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support

42

411

Yes

39

342

No

29

283

No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support No No Yes No No No No

1. From version 41: this feature is behind the Experimental Web Platform Features preference. To change preferences in Chrome, visit chrome://flags.

2. From version 34: this feature is behind the dom.fetch.enabled preference. To change preferences in Firefox, visit about:config.

3. From version 28: this feature is behind the Experimental Web Platform Features preference.

See also

Document Tags and Contributors

Last updated by: fscholz,