Counting parameters in Javascript

Question

What the docs at Mozilla says:

  console.log((function(...args) {}).length); 
  // 0, rest parameter is not counted

  console.log((function(a, b = 1, c) {})         


        

Answer 1

Not sure if this answers what you were asking... based on your examples though...

var x = function (...args) {
  //console.log(Object.keys(args).length);
  //console.log(Object.keys(arguments).length);
  console.log(arguments.length);
}

https://jsfiddle.net/hxm4smc1/555/