Babel Transpiler

input.js

var myAnonymous = (b, c) => b*c;

function makeSummer(a, b=2, c=3){
  return (a) => a+b+c;
}

function listPrinter(...d){
  console.log(d);
}

function blockContext(){
  var a = 5;
  if(1 < 2){
    let a = 3;
  }
  return a;
}

output.js

"use strict";

var _temporalUndefined = {};

function _temporalAssertDefined(val, name, undef) { if (val === undef) { throw new ReferenceError(name + " is not defined - temporal dead zone"); } return true; }

var myAnonymous = function myAnonymous(b, c) {
  return b * c;
};

function makeSummer(a) {
  var a = _temporalUndefined;
  var b = _temporalUndefined;
  var c = _temporalUndefined;
  a = arguments.length <= 0 || arguments[0] === undefined ? undefined : arguments[0];
  b = arguments.length <= 1 || arguments[1] === undefined ? 2 : arguments[1];
  c = arguments.length <= 2 || arguments[2] === undefined ? 3 : arguments[2];

  return function (a) {
    return a + (_temporalAssertDefined(b, "b", _temporalUndefined) && b) + (_temporalAssertDefined(c, "c", _temporalUndefined) && c);
  };
}

function listPrinter() {
  for (var _len = arguments.length, d = Array(_len), _key = 0; _key < _len; _key++) {
    d[_key] = arguments[_key];
  }

  console.log(d);
}

function blockContext() {
  var a = 5;
  if (1 < 2) {
    var _a = _temporalUndefined;
    _a = 3;
  }
  return a;
}