Spread And Rest

Spread

… (dot dot dot) basically is just a concat, you can enter and exit a function with …args

var User = function(...args) {
  // ...args is now an array
  console.log(args);
 
  return args;
};
 
var args = User(1,2,3,4,5);  
console.log(args); // [1,2,3,4,5]
 
console.log(args[0]); // 1
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