URLSearchParams.append()

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

 

The append() method of the URLSearchParams interface appends a specified key/value pair as a new search parameter.

Syntax

URLSearchParams.append(name, value)

Parameters

name
The name of the parameter to append.
value 
The value of the parameter to append.

Returns

Void

Example

let url = new URL('https://example.com?foo=1&bar=2');
let params = new URLSearchParams(url.search.slice(1));

//Add a second foo parameter.
params.append('foo', 4);
//Query string is now: 'foo=1&bar=2&foo=4'

Specifications

Specification Status Comment
URL
The definition of 'append()' in that specification.
Living Standard Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 49Edge Full support 17Firefox Full support 29IE No support NoOpera Full support 36Safari ? WebView Android Full support 49Chrome Android Full support 49Edge Mobile Full support 17Firefox Android Full support 29Opera Android Full support 36Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

Contributors to this page: fscholz, chrisdavidmills, jpmedley, rolfedh
Last updated by: fscholz,