Updating existing URL querystring values with jQuery

Question

Let\'s say I have a url such as:

http://www.example.com/hello.png?w=100&h=100&bg=white

What I\'d like to do is update the values of

Answer 1

Another way (independent of jQuery or other libraries): https://github.com/Mikhus/jsurl

var u = new Url;
// or
var u = new Url('/some/path?foo=baz');
alert(u);
u.query.foo = 'bar';
alert(u);

Answer 2

My URL is like this: http://localhost/dentistryindia/admin/hospital/add_procedure?hid=241&hpr_id=12

var reExp = /hpr_id=\\d+/;
var url = window.location.href;
url = url.toString(); 
var hrpid = $("#category :selected").val(); //new value to replace hpr_id
var reExp = new RegExp("[\\?&]" + 'hpr_id' + "=([^&#]*)"),
delimeter = reExp.exec(url)[0].charAt(0),
newUrl = url.replace(reExp, delimeter + 'hpr_id' + "=" + hrpid);
window.location.href = newUrl;

This is how it worked for me.

Answer 3

URI.js seems like the best approach to me http://medialize.github.io/URI.js/

let uri = URI("http://test.com/foo.html").addQuery("a", "b");
// http://test.com/foo.html?a=b
uri.addQuery("c", 22);
// http://test.com/foo.html?a=b&c=22
uri.hash("h1");
// http://test.com/foo.html?a=b&c=22#h1
uri.hash("h2");
// http://test.com/foo.html?a=b&c=22#h2

Answer 4

Get query string values this way and use $.param to rebuild query string

UPDATE:

This is an example, also check fiddle:

  function getQueryVariable(url, variable) {
  	 var query = url.substring(1);
     var vars = query.split('&');
     for (var i=0; i<vars.length; i++) {
          var pair = vars[i].split('=');
          if (pair[0] == variable) {
            return pair[1];
          }
     }

     return false;
  }

  var url = 'http://www.example.com/hello.png?w=100&h=100&bg=white';
       
  var w = getQueryVariable(url, 'w');
  var h = getQueryVariable(url, 'h');
  var bg = getQueryVariable(url, 'bg');

  // http://www.example.com/hello.png?w=200&h=200&bg=white
  var params = { 'w':200, 'h':200, 'bg':bg };
  var new_url = 'http://www.example.com/hello.png?' + jQuery.param(params);

You can change the function to use current url:

  function getQueryVariable(variable) {
  	 var query = window.location.search.substring(1);
     var vars = query.split('&');
     for (var i=0; i<vars.length; i++) {
          var pair = vars[i].split('=');
          if (pair[0] == variable) {
            return pair[1];
          }
     }

     return false;
  }

Answer 5

Simple solution

You can use URLSearchParams.set() like below:

var currentUrl = 'http://www.example.com/hello.png?w=100&h=100&bg=white';
var url = new URL(currentUrl);
url.searchParams.set("w", "200"); // setting your param
var newUrl = url.href; 
console.log(newUrl);

Online demo (jsfiddle)

Answer 6

//update URL Parameter
function updateURL(key,val){
    var url = window.location.href;
    var reExp = new RegExp("[\?|\&]"+key + "=[0-9a-zA-Z\_\+\-\|\.\,\;]*");

    if(reExp.test(url)) {
        // update
        var reExp = new RegExp("[\?&]" + key + "=([^&#]*)");
        var delimiter = reExp.exec(url)[0].charAt(0);
        url = url.replace(reExp, delimiter + key + "=" + val);
    } else {
        // add
        var newParam = key + "=" + val;
        if(!url.indexOf('?')){url += '?';}

        if(url.indexOf('#') > -1){
            var urlparts = url.split('#');
            url = urlparts[0] +  "&" + newParam +  (urlparts[1] ?  "#" +urlparts[1] : '');
        } else {
            url += "&" + newParam;
        }
    }
    window.history.pushState(null, document.title, url);
}