node.tar.gz

node:latest

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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Just completed this amazing ebook  by @montalesi. I would recommend anyone who is looking to upgrade their es6, 7 or 8 knowledge to go through the book once. It is short crisp and to the point and serves as a great resource that you can go through in limited time

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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

they will throw an error when trying to re-assign their value

they can only hold strings and not integers

### What is the main characteristic of a `symbol`?

<h3>What is the main characteristic of a <code>symbol</code>?</h3>


### What is the correct output of the following code?

```javascript
const friends = {
  "Tom" : "bff",
  "Jim" : "brother",
  "Tom" : "cousin",
}

for (friend in friends){
  console.log(friend);
}
```

<h3>What is the correct output of the following code?</h3>
<pre><code class="language-javascript">const friends = {
  &quot;Tom&quot; : &quot;bff&quot;,
  &quot;Jim&quot; : &quot;brother&quot;,
  &quot;Tom&quot; : &quot;cousin&quot;,
}

for (friend in friends){
  console.log(friend);
}
</code></pre>


### What is the correct output of the following code?

```javascript
const family = {
  [Symbol("Tom")] : "father",
  [Symbol("Jane")] : "mother",
  [Symbol("Tom")] : "brother",
};

const symbols = Object.getOwnPropertySymbols(family);
console.log(symbols);
```

<h3>What is the correct output of the following code?</h3>
<pre><code class="language-javascript">const family = {
  [Symbol(&quot;Tom&quot;)] : &quot;father&quot;,
  [Symbol(&quot;Jane&quot;)] : &quot;mother&quot;,
  [Symbol(&quot;Tom&quot;)] : &quot;brother&quot;,
};

const symbols = Object.getOwnPropertySymbols(family);
console.log(symbols);
</code></pre>


In this lesson, we will solve a quiz related to the concepts covered in the previous lesson.

Introduction

Intro To JavaScript

ES6

From ES2016 to ES2022

Intro To TypeScript

Appendix

Quiz

What is a `symbol`?