// Tutorial //

Rest Parameters in JavaScript with ES6 / ES2015

Published on November 2, 2016
Default avatar
By Alligator.io
Developer and author at DigitalOcean.
Rest Parameters in JavaScript with ES6 / ES2015

While we believe that this content benefits our community, we have not yet thoroughly reviewed it. If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial.

Rest parameters are a new way in ES6 / ES2015 to work with functions that have an arbitrary amount of arguments passed in:

function myFunc(...someArgs) {
  for (let i = 0; i < rest.length; i++) {
    console.log(`Argument ${ i + 1 }: ${ rest[i] }`);

Now let’s call the function:

myFunc('Paul', 'John', 'Ringo');

And this is what we’ll get at the console:

Argument 1: Paul
Argument 2: John
Argument 3: Ringo

Prior to ES6, the arguments array-like object could be used, but more boilerplate code was needed to be able to treat arguments like a real array.


You can define an array as the rest parameter, and the passed-in arguments will be broken down into the array:

function myFunc(...[name1, name2, name3]) {
  console.log(name1, name2, name3);

let names = ['Paul', 'John', 'Ringo'];

Want to learn more? Join the DigitalOcean Community!

Join our DigitalOcean community of over a million developers for free! Get help and share knowledge in our Questions & Answers section, find tutorials and tools that will help you grow as a developer and scale your project or business, and subscribe to topics of interest.

Sign up
About the authors
Default avatar
Developer and author at DigitalOcean.

Still looking for an answer?

Was this helpful?
Leave a comment

This textbox defaults to using Markdown to format your answer.

You can type !ref in this text area to quickly search our full set of tutorials, documentation & marketplace offerings and insert the link!