How to check if one one string contains another string in Javascript

To check if one one string contains another string in Javascript you can use the following method.

Sample JS

if(testString.indexOf("substring") > -1){
}

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IndexOf method for Javascript

With the snippet below you can use the IndexOf method for Javascript.

Sample JS

Array.prototype.IndexOf = Array.prototype.IndexOf || function (element) {
    for (var i=0; i < this.length; i++) {
        if(this[i] === element) return i;
    }
    return -1;
};

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