why javascript contains property is not working in chrome browser?

Question

Why javascript contains property is not working in chrome browser? I have tried that Contains Property in javascript.It is working fine in Mozila Firefox Browser. But It is not working in Chrome browser.How to fix this?

Link: http://www.codingslover.com/2014/11/why-javascript-contains-property-is-not.html

var ClearFilterValue='family Schools'; if(ClearFilterValue.contains("family")== true) {       alert('Success'); } 

Answer 1

indexof returns the position of the string. If not found, it will return -1:

var ClearFilterValue = 'family Schools'; alert(ClearFilterValue.indexOf("family") != -1); 

Answer 2

contains is not supported in Chrome, but you could use a polyfill:

if (!String.prototype.contains) {     String.prototype.contains = function(s) {         return this.indexOf(s) > -1     } } 'potato'.contains('tat') // true 'potato'.contains('tot') // false