Possible Duplicate:
JavaScript: string contains
Jquery: How to see if string contains substring
In ASP .NET C# I use:
string aa = "aa bb"; if (aa.Contains("aa")) { //Some task } I want to same thing in client side means in JQuery. Something like below:
var aa = "aa bb"; if(aa. -----want help here){ } Is there any method to do this?
Use the String.indexOf() MDN Docs method
if( aa.indexOf('aa') != -1 ){ // do whatever } Update
Since ES6, there is a String.includes() MDN Docs so you can do
if( aa.includes('aa') ){ // do whatever } 
C#'s implementation of .Contains is actually a wrapper on it's implementation of .IndexOf. Therefore you can create your own .Contains function in javascript like this:
String.prototype.Contains = function (s) { return this.indexOf(s) != -1; } You can use a regular expression for more complex scenarios, or indexOf for simple ones.
if (aa.match(/a(b|c)a/)) { } or
if (aa.indexOf('aa') >= 0) { } In Javascript you use indexOf for that.
var aa = "aa bb"; if(aa.indexOf('aa') != -1) { } But remember that indexOf is case sensitive.
you can create your own contains method using prototype that can, if you want, handle that.
String.prototype.contains = function(value, ignorecase) { if (ignorecase) { return (this.toLowerCase().indexOf(value.toString().toLowerCase()) != -1); } else { return this.indexOf(value) != -1; } }; alert("aa bb".contains("aa")) Source: 'contains' method in javascript, extend the String prototype and add your own methods.
Since Java 5, contains() also exists and can be used the same way.
