Gain insights into ES6 essentials with 22 lessons and 140+ coding playgrounds. Discover template literals, generator functions, promises, maps, and more for modern JavaScript development.

ES6 is the future of JavaScript and modern JavaScript frameworks like React are based on ES6. Every web developer needs to learn ES6 to stay relevant. It's also more fun to write ES6 code.

With 22 lessons and 140+ coding playgrounds, this course will help you become a better developer, and allow you to review the features you want when you want. Let's Learn ES6 is an interactive course meant to help developers understand the new syntax and features of ES6. After this course, you would be able to comprehend:

1. Template literals, 
2. Generator functions
3. Promises
4. Maps and more. 

Let's go ahead and start learning ES6.

[Ryan Christiani is the Head Instructor & Development Lead at HackerYou in Toronto]

Let's learn ES6! Master new JavaScript features faster and easier

Promises have been around for a while in JavaScript, but we have never had them in the language itself. In the past we would have had to use a library like `q` or `bluebird`. These libraries follow something called Promises/A+ , it is a standard that outlines how a Promise should behave, and it is the spec that ES6 Promises also implement.

A Promise represents the eventual result of some sort of asynchronous operation. Commonly these are used in conjunction with an HTTP request. However, it could actually just be any sort of event that will take some time to return. Promises can be a few different states. When a promise is created it has a 'pending' state. From there the Promise can have 2 other states, it can be fulfilled(commonly you will hear the word resolved used here), or rejected. 

In ES6 the Promise is a constructor that when instantiated will return a new object. This constructor takes what is called an executor, which is a callback function that has two parameters.