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Parse GetVars With JavaScript

10.20.2007

| 5734 views |

        There are many examples of how to parse get vars client side around, but most of them are using arrays and take much more lines of code and ram then nescesary. This one gives an elegant way to get values of given get parameters:

/* javascript */
String.prototype.get = function(p){
  return(this.match(new RegExp("[?|&]?" + p + "=([^&]*)"))[1]);
}

/* test: yourfile.html?test=test234 alerts: test234 */
alert(window.location.search.get('test'));

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Comments

Snippets Manager replied on Fri, 2010/06/25 - 4:02pm

Awesome guys! This resolved a couple of days frustration with using another window.location.search parsing solution which hung up in IE but not in Firefox and Chrome.

Snippets Manager replied on Thu, 2009/01/22 - 10:42am

I've tried to improve this even more by adding a cache:


String.prototype.getvars = [];
String.prototype.get = function(p){
    if (this.getvars[p]) {
        return this.getvars[p];
    }
    var match = this.match(new RegExp("[?|&]?" + p + "=([^&]*)"));
    return this.getvars[p] = (match) ? match[1] : false;
}

Snippets Manager replied on Wed, 2007/10/17 - 3:54pm

@pyrou thanks for the improvement ;)

Snippets Manager replied on Mon, 2007/10/22 - 5:33am

test case is ?test1=var1&test2= instead ?test1=var1&test2 ;)

Snippets Manager replied on Mon, 2007/10/22 - 5:33am

You got an error if try getting an undefined var this looks better :) thanks for your snippet.. useful for me ;)


/* javascript */
String.prototype.get = function(p){
    return (match = this.match(new RegExp("[?|&]?" + p + "=([^&]*)"))) ? match[1] : false;
}

// window.location = ?test1=var1&test2 

alert(window.location.search.get('test1')); // "var1"
alert(window.location.search.get('test2')); // ""  (null)
alert(window.location.search.get('test3')); // false