Lesson Monday

JavaScript development is in a constant state of evolution. A big part of being a JS developer is keeping up with changes to popular libraries, frameworks, and the language itself. Frameworks that were popular a few years ago (such as backbone.js) are quickly replaced by cutting edge frameworks (like react.js). Node modules become outdated and deprecated. Libraries are in a constant state of churn.

ES6, also, somewhat confusingly known as ES2015, adds new functionality to JavaScript. Much of this functionality has since been widely adopted by JavaScript developers. (ECMAScript is the “official” name for JavaScript.)

We've actually already been using one of the most important ES6 features since we first started using JavaScript: let and const (instead of var). In the next few weeks, we'll cover some of the most popular ES6 features, including arrow notation, the class keyword, and template literals.

We'll also learn about promises, which help us manage asynchronous code. Promises are a great example of how functionality gets incorporated into JavaScript. Until ES6, developers had to use libraries like Promise.js and Bluebird.js if they wanted to add this functionality to their applications. However, promises proved to be so popular that they became native to ES6.

By the end of next week, you'll be able to use the following ES6 features:

  • Arrow notation
  • Template literals
  • Promises
  • class keyword
  • Modules

You're also encouraged to explore other ES6 features on your own. You can learn more about ES6 features here.

Lesson 34 of 43
Last updated October 18, 2021