search(regexp) Tests for a match in a string. It returns the index of the match, or -1 if not found.

gistfile1.txt

//search(regexp)
var intRegex = /[0-9 -()+]+$/;  

 

var myNumber = '999';
var isInt = myNumber.search(intRegex);
console.log(isInt);
//output: 0

 

var myString = '999 JS Coders';
var isInt = myString.search(intRegex);
console.log(isInt);
//output: -1