Learn to build web applications using Node.js and the Express framework.

Become a MEAN Stack Developer

Node.js is a runtime environment that enables JavaScript to run outside the browser. In this module, we'll learn the fundamentals of Node.js to build portable applications. We'll learn about the components of Node.js and make patterns using these. We'll also explore the API to learn how to create modules and write code for unique data files. Moreover, we'll delve into the features and practices of JavaScript and build a REST API using the Express framework from scratch. Moving on, we'll use Passport.js and JSON web tokens to establish authentication tokens. We’ll then create a live trivia game with Socket.IO. By the end of this module, we'll be equipped with extensive knowledge to build rich and comprehensive Node.js applications running on the server with JavaScript.

Learn Node.js from Scratch

By the end of this lesson, we’ll be able to do the following:

- Use rest parameters to collect an arbitrary number of property keys in an object into a new object.
- Apply the spread operator to create a shallow copy of an object.

## Rest parameters and spread syntax with `...`

Depending on the context, the syntax `...` can be used as rest parameters or spread syntax. We can use rest and spread with arrays or objects.

### Rest parameters
The rest parameters can collect an arbitrary number of property keys in an object into a new object:

By the end of this lesson, we’ll be able to do the following:

- Use rest parameters to collect an arbitrary number of property keys in an object into a new object.
- Apply the spread operator to create a shallow copy of an object.

# Rest parameters and spread syntax with `...`

Depending on the context, the syntax `...` can be used as rest parameters or spread syntax. We can use rest and spread with arrays or objects.

## Rest parameters
The rest parameters can collect an arbitrary number of property keys in an object into a new object:

Learn about rest parameters and spread syntax in this lesson.

Node.js Overview

The Node.js API

JavaScript Essentials Review

Building a RESTful API with Express

Authentication with Passport.js and JSON Web Tokens

Build a Live Trivia Game with Socket.IO

Appendix

Conclusion

JavaScript Rest and Spread

Rest parameters and