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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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

# The `for of` loop

ES6 introduced a new type of loop, the `for of` loop. 
Let’s take a look at how it is used.

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## Iterating over an array

Usually, we would iterate using the following method:

var fruits = ['apple','banana','orange'];
for (var i = 0; i < fruits.length; i++){
  console.log(fruits[i]);
}
// apple
// banana
// orange

This is a normal loop where at each iteration we increase the value of `i` by 1 as long as it is less than `fruits.length`. At that point the loop will stop.

Look at how we can achieve the same with a `for of` loop:

Let's have a look at the new type of loops the ES6 introduced.

Introduction

Intro To JavaScript

ES6

From ES2016 to ES2022

Intro To TypeScript

Appendix

Iterables and Looping

The `for of` loop #

Iterating over an array #

Iterables and Looping

The for of loop #

Iterating over an array #

The `for of` loop #