Get a variable from url parameter using Javascript

Question

I am trying to get a url value using javascript, so far I can only get pure numbers, not mixed numbers with letters or just letters. I can\'t find any working examples of a

Answer 1

Your approach should work. Here's my version for comparison:

var o = {
    keys: [ ],
   values: [ ]
}

/* 
You could just use the window#location#search value to get the query sub-String of the currently loaded URL

 var q = window.location.search.substring(1) ; 

For now we'll use a query String from a Google search for "MDN window location"
*/

q = "q=mdn+window+location&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:de:official&client=firefox-a"

for( var i = 0 , a = q.split("&"), p ; i < a.length ; i++ ) {
    p = a[i] ;
    if(  ( b = p.split("=") )  !=  null ) {
        o.keys[i] = b[0] ;
        o.values[i] = b[1] ;
    }
}


console.log("(!!) o: " + o.toSource( ) ) ;

---

• try it on JSFiddle

Answer 2

I use this function, and it rocks. I don't remember from where I took it, but it's a good one:

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

If you have a URL like http://www.exmaple.com/path?p1=lkjsd234&p2=klsjd987, you can use:

alert(gup('p1')); // shows 'lkjsd234';

Answer 3

Here is a condensed version of two of the answers above :

function gup (name) {
  name = RegExp ('[?&]' + name.replace (/([[\]])/, '\\$1') + '=([^&#]*)');
  return (window.location.href.match (name) || ['', ''])[1];
}

Easier to type, easier on processing and, IMHO easier to read. YMMV

Answer 4

Your code looks like it should work I use the function below if it helps

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

var first = getParam("test");