Function bind(obj[, arg1[, arg2[, ...]]]) polyfill

polyfill.bind.js

if (typeof Function.prototype.bind === 'undefined') {
    /**
     * Function bind(obj[, arg1[, arg2[, ...]]]) polyfill
     *
     * @param obj
     *
     * @returns {Function}
     */
    Function.prototype.bind = function (obj) {
        var fn   = this,
            args = [].slice.call(arguments, 1) || [];

        if (typeof fn !== "function") {
            throw new TypeError(fn.toString() + " is not a function. Unable to bind.");
        }

        return function () {
            fn.apply(obj, args.concat([].slice.call(arguments)));
        };
    };
}