Gain insights into JavaScript from basics to ES2021, delve into TypeScript essentials, and test your knowledge through quizzes and coding challenges to reinforce learning.

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Jan/2021 Updated to include ES2021

Whether you are a complete beginner or you have some knowledge of JavaScript, this course will guide you from the basics of the language to all the new features introduced up until 2021.  You’ll test your knowledge with quizzes and some coding challenges at the end of each chapter. 

After following this course, the functions and variables let, const, generators, promises and async won't be a problem anymore.

If you want to experience something new, this course also includes an introduction to the basics of TypeScript, which is a must-know for any JavaScript developer.

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@battago

I have been working as a front-end developer for over 5 years but I am still reading the book by @montalesi because I find it really exhaustive and well written.

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The Complete Guide to Modern JavaScript

ES2016 introduced just only two new features:

- `Array.prototype.includes()`
- The exponential operator

&nbsp;

# `Array.prototype.includes()`

The `includes()` method will return `true` if our array includes a certain element, or `false` if it doesn't.

let array = [1,2,4,5];

console.log(array.includes(2));
// true
console.log(array.includes(3));
// false


&nbsp;

## Combine `includes()` with `fromIndex`

We can provide `.includes()` with an index to begin searching for an element. Default is 0, but we can also pass a negative value.

The first value we pass in is the element to search and the second one is the index:

Let’s check out  the new features introduced in ES2016.

Introduction

Intro To JavaScript

ES6

From ES2016 to ES2022

Intro To TypeScript

Appendix

Everything new in ES2016

`Array.prototype.includes()` #

Everything new in ES2016

Array.prototype.includes() #

`Array.prototype.includes()` #