URLSearchParams.set

The set() method of the URLSearchParams interface sets the value associated with a given search parameter to the given value. If there were several matching values, this method deletes the others. If the search parameter doesn't exist, this method creates it.

Syntax

URLSearchParams.set(name, value)

Parameters

name

The name of the parameter to set.

value

The value of the parameter to set.

Returns

Void

Example

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

//Add a third parameter.
params.set('baz', 3);

Example2

This is a real-life example demonstrating how to create a URL and set some search parameters.

You can copy&paste the example in your [Scratchpad]

• line#41: comment to stop dumping the search parameters to the console (debug).
• line#43: Will dump the generated object and it's string representation to the console (info).
• line#44: Will automatically try to open a new window/tab with the generated url (when uncommented).
• See also Issue 242 on gskinner/regexr @github about a bug in this function...

'use strict'

function genURL(rExp, aText, bDebug=false){
	let theURL

	theURL= new URL('https://regexr.com')
	theURL.searchParams.set( 'expression', rExp.toString() )
	theURL.searchParams.set( 'tool', 'replace' )
	theURL.searchParams.set( 'input', '\u2911\u20dc' )// ⤑⃜
	theURL.searchParams.set( 'text', aText.join('\n') )
	if( bDebug ){
		// Display the key/value pairs
		for(var pair of theURL.searchParams.entries()) {
			console.debug(pair[0] + ' = \'' + pair[1] + '\''); 
		}
		console.debug(theURL)
	} 
	return theURL
}
var url = genURL(
	/(^\s*\/\/|\s*[^:]\/\/).*\s*$|\s*\/\*(.|\n)+?\*\/\s*$/gm	// single/multi-line comments
	// /(^\s*\/\/.*|\s*[^:]\/\/.*)/g								// single-line comments
	,[
		"These should work:",
		"",
		"// eslint-disable-next-line no-unused-vars",
		"lockPref(	'keyword.URL',\t\t'https://duckduckgo.com/html/?q=!+'	)\t//      test",
		"/*",
		"	* bla bla    ",
		"*/",
		"",
		"/* bla bla */",
		"",
		"// bla bla ",
		"",
		"These shouldn\'t work:",
		"console.log(\"http://foo.co.uk/\")",
		"var url = \"http://regexr.com/foo.html?q=bar\"",
		"alert(\"https://mediatemple.net\")",
	]
	, true
)
console.info( url, url.toString() )
// window.open( url, 'regex_site' )

Specifications

Browser compatibilityUpdate compatibility data on GitHub