Check is querystring variable exists

JavaScript
1

I would like to check the querystring to see if a variable exists.

EXAMPLE:
www.somesite.com?groupid=123

If groupid exists in the querystring and has ANY value then show a hidden div (#closedMsg). I do not care what the value of the groupid is I just want to verify that it has a value.

If the url looks like this “www.somesite.com?groupid=” with no value for groupid, I do not want to show the hidden div.

Here is my code so far which targets for a value of 123, how do I make it accept any value for groupid?



<script type="text/javascript" charset="utf-8">
		// ***this goes on the global scope
// get querystring as an array split on "&"
var querystring = location.search.replace( '?', '' ).split( '&' );
// declare object
var queryObj = {};
// loop through each name-value pair and populate object
for ( var i=0; i<querystring.length; i++ ) {
      // get name and value
      var name = querystring[i].split('=')[0];
      var value = querystring[i].split('=')[1];
      // populate object
      queryObj[name] = value;
}
// ***now you can use queryObj["<name>"] to get the value of a url
// ***variable
if ( queryObj[ "groupid" ] === "123" ) {	 
	 var $messageDiv = $('#closedMsg'); // get the reference of the div
	 $messageDiv.show().html('yay, value of groupid exists');
}
</script>

THANKS EVERYONE!

2

Awesome, thanks, works great!!

3

You just need to do this:

if (queryObj['groupid']) {
  // groupid is set
}

That’s basically checking “does the groupid exist in the queryObj object”?