JAVASCRIPT

polyfill of bind

Function.prototype.cbind = function (...outer_args) {
    let that = this,
        params = outer_args.slice(1),
        obj = outer_args[0];

    return function (...inner_args) {
        that.apply(obj, [...params, ...inner_args]);
    }
}

polyfill for bind

Function.prototype.myBind = function (...args) {
  const that = this
  const params = args.slice(1)
  return function (...args2) {
    that.apply(args[0], [...params, ...args2])
  }
}