wiki/content/20201103111357-rest_operator_in_object_destructuring.md

date	id	title
20201103	78ef5b06-a541-4e33-9c51-af92cd91719c	Rest Operator (…) in Object Destructuring

Introduction

Introduced in ES2018 to help with destructuring.

Syntax

Basic

const obj = { foo: 1, bar: 2, baz: 3 };
const { foo, ...rest } = obj;

console.log(foo); // 1
console.log(rest); // { bar: 2, baz: 3 }

Named parameters

The rest operator can also be used with named parameters:

function func({ param1, param2, ...rest }) {
  // rest operator
  console.log("All parameters: ", { param1, param2, ...rest }); // spread operator
  return param1 + param2;
}