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JQUERY
|| Published on :
Tuesday, July 22, 2014 || Views:
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Get QueryString values using JavaScript
For reading QueryString in JavaScript. We will create a name value collection and then retrieving the specific key from that array or collection. For that first create a JavaScript function as below to read querystring in javascript. This Trick wil help the developers in real world conditions
function getQueryStrings() {
//Holds key:value pairs
var queryString = null;
//Get querystring from url
var requestUrl = window.location.search.toString();
if (requestUrl != '') {
//window.location.search returns the part of the URL
//that follows the ? symbol, including the ? symbol
requestUrl = requestUrl.substring(1);
queryString = new Array();
//Get key:value pairs from querystring
var Pairs = requestUrl.split('&');
for (var i = 0; i < Pairs.length; i++) {
var Pair = Pairs[i].split('=');
queryString[Pair[0]] = Pair[1];
}
}
return queryString;
}
Consider an example URL that reads www.sourcecodehub.com.com/file.htm?Q1=123&Q2=345 Next JavaScript function will read the array using the name of the QueryString as below
1 function myfunction() {
2 var queryString = getQueryStrings();
3
4 //if nothing found in querystring
5 if (queryString == null) {
6 alert('no querystring found');
7 return;
8 }
9
10 //URL format: www.sourcecodehub.com.com/file.htm?Q1=123&Q2=345
11 alert(queryString['Q1']);
12 alert(queryString['Q2']);
13 }
Then place input button to see the QueryString values as below
1 "Button1" type="button" value="Click me!!!" onclick="myfunction()" />
Complete Source Codes
1 "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2
"http://www.w3.org/1999/xhtml"> 34Get QueryString values using JavaScript 5 46 47
48 "Button1" type="button" value="Click me!!!" onclick="myfunction()" /> 49
50
56
5758
Output will be like this....
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So In this article we learn how we can read QueryString in JavaScript, stay tuned for much and more excited articles on JavaScript.
Download Source Codes