How to replace url parameter with javascript/jquery?

Question

I\'ve been looking for an efficient way to do this but haven\'t been able to find it, basically what I need is that given this url for example:

http://localh         


        

Answer 1

2020 answer since I was missing the functionality to automatically delete a parameter, so:

Based on my favorite answer https://stackoverflow.com/a/20420424/6284674 : I combined it with the ability to:

• automatically delete an URL param if the value if null or '' based on answer https://stackoverflow.com/a/25214672/6284674

• optionally push the updated URL directly in the window.location bar

• IE support since it's only using regex and no URLSearchParams

JSfiddle: https://jsfiddle.net/MickV/zxc3b47u/

function replaceUrlParam(url, paramName, paramValue){
    if(paramValue == null || paramValue == "")
        return url
        .replace(new RegExp('[?&]' + paramValue + '=[^&#]*(#.*)?$'), '$1')
        .replace(new RegExp('([?&])' + paramValue + '=[^&]*&'), '$1');   
    url = url.replace(/\?$/,'');
    var pattern = new RegExp('\\b('+paramName+'=).*?(&|$)')
    if(url.search(pattern)>=0){
        return url.replace(pattern,'$1' + paramValue + '$2');
    }
    return url + (url.indexOf('?')>0 ? '&' : '?') + paramName + '=' + paramValue 
}

// Orginal URL (default jsfiddle console URL)
//https://fiddle.jshell.net/_display/?editor_console=true

console.log(replaceUrlParam(window.location.href,'a','2'));   
//https://fiddle.jshell.net/_display/?editor_console=true&a=2

console.log(replaceUrlParam(window.location.href,'a',''));   
//https://fiddle.jshell.net/_display/?editor_console=true

console.log(replaceUrlParam(window.location.href,'a',3));   
//https://fiddle.jshell.net/_display/?editor_console=true&a=3

console.log(replaceUrlParam(window.location.href,'a', null));   
//https://fiddle.jshell.net/_display/?editor_console=true&

//Optionally also update the replaced URL in the window location bar
//Note: This does not work in JSfiddle, but it does in a normal browser
function pushUrl(url){
    window.history.pushState("", "", replaceUrlParam(window.location.href,'a','2'));   
}


pushUrl(replaceUrlParam(window.location.href,'a','2'));   
//https://fiddle.jshell.net/_display/?editor_console=true&a=2

pushUrl(replaceUrlParam(window.location.href,'a',''));   
//https://fiddle.jshell.net/_display/?editor_console=true

pushUrl(replaceUrlParam(window.location.href,'a',3));   
//https://fiddle.jshell.net/_display/?editor_console=true&a=3

pushUrl(replaceUrlParam(window.location.href,'a', null));   
//https://fiddle.jshell.net/_display/?editor_console=true&