How to find a string within a jQuery or javascript string

 Sometimes, you required to find a the existence of a small string with in a string. This article will demonstarte, how could you do by using plain JavaScript.

First Method

//returns -1 if doesn't contains
if (str.indexOf("Hello") >= 0) 
{
 //string contains Hello
}
//OR
//For your are not sure about the case of the string
//returns -1 if doesn't contains
if (str.toLowerCase().indexOf("hello") >= 0)
{
 //string contains hello
}

This indexOf() method will return the position of the match, or -1 if it isn’t found.

Second Method

//returns false if doesn't contains
if (/hello/i.test(str))
{
 //string contain Hello
}