Equivalent of ASP's .Contains method [duplicate]

Question

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?

Answer 1

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 } 

Answer 2

You don't need jQuery for this. It can be achieved with simple pure JavaScript:

var aa = "aa bb"; if(aa.indexOf("aa") >= 0){    //some task } 

The method indexOf will return the first index of the given substring in the string, or -1 if such substring does not exist.