URLSearchParams.append()

This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.

 

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

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 49.0 (Yes) No support (Yes) ?
Feature Android Android Webview Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support 49.0 (Yes) No support (Yes) ? 49.0

See also

Document Tags and Contributors

 Last updated by: chrisdavidmills,