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

Answer 1

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