How to get query string values in JavaScript or jQuery?

You can get query string data in javascript, without jquery using the function below

var querystring = (function(a) {
    if (a == "") return {};
    var b = {};
    for (var i = 0; i < a.length; ++i)
    {
        var p=a[i].split('=', 2);
        if (p.length == 1)
            b[p[0]] = "";
        else
            b[p[0]] = decodeURIComponent(p[1].replace(/\+/g, " "));
    }
    return b;
})(window.location.search.substr(1).split('&'));

to use the above function, suppose your query string parameter is ?id=133&value=query+string+in+javascript, to get these values you can run function like this:

querystring["id"] //133
querystring["value"] // query string in javascript
querystring["Nothing"] //undefined

Query string using jQuery

function getQueryString()
{
    var vars = [], hash;
    var hashes = window.location.href.slice(window.location.href.indexOf('?') + 1).split('&');
    for(var i = 0; i < hashes.length; i++)
    {
        hash = hashes[i].split('=');
        vars.push(hash[0]);
        vars[hash[0]] = hash[1];
    }
    return vars;
}

If you have URL like this

http://demo.com/?id=123&value=SomeValue

If will return

{
    "id"    : "123",
    "value" : "SomeValue"
}

Or you can get it by using function

var id= getQueryString()["id"];

Take a look at this solution if you want it in PHP-javascript, as per the comment on facebook here

Code for it:

var $_GET = (function(){
 var g, r = {}, s = location.search.substr(1).split("&");
 for (var i = 0; i < s.length; i++)
  if ((g = s[i].split("=")).length)
   r[decodeURI(g[0])] = decodeURI(g[1] || "");
 return r;
})();
console.log($_GET);
// 1st: ?d              --> is valid query!
// 2nd: ?d=             --> same as above
// 3rd: ?a[]=d&a[]=4    --> don't even try bro, use post for that xD

Paste-bin URL

Get Query string value using ES6

getQueryStringParams = query => {
    return query
        ? (/^[?#]/.test(query) ? query.slice(1) : query)
            .split('&')
            .reduce((params, param) => {
                    let [key, value] = param.split('=');
                    params[key] = value ? decodeURIComponent(value.replace(/\+/g, ' ')) : '';
                    return params;
                }, {}
            )
        : {}
};

console.log( getQueryStringParams("https://jsfiddle.net/?testing=123&hello=world"));

//output
//{
//  hello: "world",
//  https://jsfiddle.net/?testing: "123"
//}
//

Source: How to get query string from url using jQuery or Javascript?

Thanks