Imitation of Function.prototype.call

call.js

Function.prototype.myCall = function(thisArgs) {
  thisArgs.$fn = this  //
  let args = []
  for(let i = 1; i<arguments.length; i++){
    args.push(arguments[i])
  }
  var result = thisArgs.$fn(...args)
  delete thisArgs.$fn
  return result
}