jQuery: How to get parameters of a url?

Question

New to jQuery and I'm having trouble getting the parameters of a url that my server generates. I have a url like this:

<span class="popuptest"><a href="www.example.com/test?param1=1&param2=2">find param</a></span>

my jquery function looks like so:

$(function() {
  $('.popuptest a').live('click', function(event) {
  $.extend({
    getUrlVars: function(){
      var vars = [], hash;
      var hashes = this.href.slice(this.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;
    },
    getUrlVar: function(name){
      return $.getUrlVars()[name];
    }
  });
  var second = getUrlVars()["param2"];
  alert(second);
  return false;
  });
});

clicking on the link should show me "2", however I get nothing... any help for a jQuery noob? thanks in advance!

I found this on a blog: http://jquery-howto.blogspot.com/2009/09/get-url-parameters-values-with-jquery.html

Answer 1

You don't need jQuery for that purpose you can use the pure JavaScript:

function getParameterByName( name,href )
{
  name = name.replace(/[\[]/,"\\\[").replace(/[\]]/,"\\\]");
  var regexS = "[\\?&]"+name+"=([^&#]*)";
  var regex = new RegExp( regexS );
  var results = regex.exec( href );
  if( results == null )
    return "";
  else
    return decodeURIComponent(results[1].replace(/\+/g, " "));
}

and you can call the function in this way..getParameterByName(param1,href of your link)

DEMO

Answer 2

Your jquery could be

$(function() {  
 $('.popuptest a').live('click', function(event) {
 $.extend({     getUrlVars: function(){
  var vars = [], hash;
  var hashes = $('.popuptest a').attr("href").slice($('.popuptest     a').attr("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;
},
getUrlVar: function(name){
  return $.getUrlVars()[name];
}
  });
  var second = $.getUrlVars()["param2"];
  alert(second);
  return false;
  });
});

things to note:

1. $.getUrlVars in line - var second = $.getUrlVars()["param2"];
2. this.href is replaced to $('.popuptest a').attr("href")

Answer 3

small improvement, parse the url only once, return array or params:

function getURLParameters(url){

    var result = {};
    var hashIndex = url.indexOf("#");
    if (hashIndex > 0)
       url = url.substr(0, hashIndex);        
    var searchIndex = url.indexOf("?");
    if (searchIndex == -1 ) return result;
    var sPageURL = url.substring(searchIndex +1);
    var sURLVariables = sPageURL.split('&');
    for (var i = 0; i < sURLVariables.length; i++)
    {       
        var sParameterName = sURLVariables[i].split('=');      
        result[sParameterName[0]] = sParameterName[1];
    }
    return result;
}

http://jsfiddle.net/shakhal/gXM3u/

Answer 4

function getURLParameter(name) {
    return decodeURI(
        (RegExp(name + '=' + '(.+?)(&|$)').exec(location.search)||[,null])[1]
    );
}

Answer 5

it's so easy, all you have to do is put the variable name that you want it from the URL into this function then it will return you the value of URL variable

function getParameterByName(name) {
 return decodeURIComponent((new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(location.search)||[,""])[1].replace(/\+/g, '%20'))||null;
}

Answer 6

Using code below for some time, but recently discoverd a problem with an base64_encode string in the URL, having == at the end, like: /index.php?a=1&b=2&c=Mw==&d=4.

Using getUrlVar("c") gives me 'Mw' as result, but this should be 'Mw==', so added an extra line:

 $.extend({
  getUrlVars: function(){
   var vars = [], hash;
   var hashes = $('.popuptest a').attr("href").slice($('.popuptest a').attr("href").indexOf('?') + 1).split('&');
   for(var i = 0; i < hashes.length; i++)
   {
    hash = hashes[i].split('=');
    vars.push(hash[0]);
    if (hash.length > 2) hash[1] = hash.slice(1).join('=');
    vars[hash[0]] = hash[1];
   }
   return vars;
  },
  getUrlVar: function(name){
   return $.getUrlVars()[name];
 }
});

Answer 7

from here

$.urlParam = function(name){
    var results = new RegExp('[\?&]' + name + '=([^&#]*)').exec(window.location.href);
    return results[1] || 0;
}

// example.com?param1=name&param2=&id=6
$.urlParam('param1'); // name
$.urlParam('id');        // 6
$.urlParam('param2');   // null

Answer 8

So simple you can use any url and get value in Javascript.And this is Complete set of codes

<!DOCTYPE html>
<html>
<head>
<script>
var tech = getQueryVariable('filename');
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);
}
alert(tech);
</script>
</head>
<body>
<p>Get parameters of a url</p>
</body>
</html>

Answer 9

Jquery have in build functions for get param form URL.

var url="http://example.com/?id=76dc915c-b1c2-47f6-ae63-a3ea6ce78f2a";

let searchParams = new URLSearchParams(window.location.search)

searchParams.has('id') // true

let paramId = searchParams.get('id');