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

Symbols are a new primitive data type in JavaScript, they can to create anonymous keys for object properties, among other things. One key feature of these properties is that they do not show up in a `for..in` loop. Symbols are created using the `Symbol` function and passed a description.


No two symbols are the same, if we created another `Symbol('name')` it would be completely different.

# Symbols for private keys
Because of a Symbols ability to be unique and excluded from enumeration, it is common to use them to create private properties. Because JavaScript has no `private` keyword this is a great use case for the `Symbol`.

Let's assume we made a `Superhero` class in a module, we can use a `Symbol` to create a `_secretIdenity` property to be used in the class.