Check if a string starts with a string and deal with null value - Node.js String

Node.js examples for String:String Start

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Description

Check if a string starts with a string and deal with null value

Demo Code

String.prototype.startsWith = function(str) {
    if (this == void 0) {throw new Error("Illegal argument error.");}
    return this.substr(0, str.length) == str;
}

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