URLSearchParams.append

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

Browser compatibilityUpdate compatibility data on GitHub

See also

• Other URL-related interfaces: URL, URLUtils.
• Google Developers: Easy URL manipulation with URLSearchParams