Bind polyfill

bind-polyfill.js

Function.prototype.myBind = function(...boundArgs) {
    let func = this;
    let context = boundArgs.shift();
    
    if (typeof this !== "function") {
        throw new Error(this + "cannot be bound as it's not callable");
    }

    return function(...targetArgs) {
        func.apply(context, args.concat(targetArgs));
    }
}