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The delete() method of the Headers interface deletes a header from the current Headers object.

This method throws a TypeError for the following reasons:

  • The value of the name parameter is not the name of an HTTP header.
  • The value of Guard is immutable.

For security reasons, some headers can only be controller by the user agent. These headers include the forbidden header names  and forbidden response header names.

Syntax

myHeaders.delete(name);

Parameters

name
The name of the HTTP header you want to delete from the Headers object.

Returns

Void.

Example

Creating an empty Headers object is simple:

var myHeaders = new Headers(); // Currently empty

You could add a header to this using Headers.append:

myHeaders.append('Content-Type', 'image/jpeg');
myHeaders.get('Content-Type'); // Returns 'image/jpeg'

You can then delete it again:

myHeaders.delete('Content-Type');
myHeaders.get('Content-Type'); // Returns null, as it has been deleted

Specifications

Specification Status Comment
Fetch
The definition of 'delete()' in that specification.
Living Standard  

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic support
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 YesFirefox 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 NoOpera 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 10.1WebView Android Full support 42
Full support 42
Full support 41
Disabled
Disabled From version 41: this feature is behind the Experimental Web Platform Features preference.
Chrome Android 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 Mobile Full support YesFirefox Android No support NoOpera 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 No support NoSamsung Internet Android Full support 4.0

Legend

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.

See also

ドキュメントのタグと貢献者

このページの貢献者: fscholz, chrisdavidmills, erikadoyle, jpmedley, kscarfone
最終更新者: fscholz,