How to check string contains text in JavaScript?

Here we will discuss how we can check if a string contains a sub string or a particular text in JavaScript.

In one of our requirement we need to check if a string is presented inside a string or not using JavaScript.

Suppose I have a string like below in JavaScript.

var myString='Welcome to AspDotNetHelp.com world !!!';

Here we need to check if myString contains "AspDotNetHelp.com" or not.

In JavaScript we can use indexOf to check this. If indexOf returns value > 0 then the string is presented.

The code will be like below:

var myString='Welcome to AspDotNetHelp.com world !!!';

if( myString.indexOf('AspDotNetHelp.com') >= 0){
  //string found
}
else
{
//string not found.
}

Hope this will be helpful.