@arnaudnyc/mout/src/string/contains.js

Modular Utilities

define(['../lang/toString'], function(toString) {

    /**
     * Searches for a given substring
     */
    function contains(str, substring, fromIndex){
        str = toString(str);
        substring = toString(substring);
        return str.indexOf(substring, fromIndex) !== -1;
    }

    return contains;

});