JavaScript indexof method

The indexOf() method returns the position of the first occurrence of a specified value in a string.
This method returns -1 if no match found.
The JavaScript indexOf() method is case sensitive.

Syntax:

string.indexOf(searchvalue,start)

where,
searchvalue =Required. The string to search for
start =Optional. Default 0. At which position to start the search

Example:

var str=”This is JavaScript indexOf() Method”;
var n=str.indexOf(“indexOf()”);
alert(n); // OUTPUT: 19

Live Demo: JavaScript indexOf Method