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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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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The Complete Guide to Modern JavaScript

is an object representing the eventual completion or failure of an asynchronous operation

<h3>What is a <code>Promise</code>?</h3>


### Which of the following promise methods does not exist?

<h3>Which of the following promise methods does not exist?</h3>


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

```javascript
function myPromise(){
    return new Promise((resolve,reject) => {
        reject();
    })
}

myPromise()
    .then(() => {
        console.log('1')
    })
    .then(() => {
        console.log('2')
    })
    .catch(() => {
        console.log('3')
    })
    .then(() => {
        console.log('4')
    });
```

<h2>What is the correct output of the following code:</h2>
<pre><code class="language-javascript">function myPromise(){
    return new Promise((resolve,reject) =&gt; {
        reject();
    })
}

myPromise()
    .then(() =&gt; {
        console.log('1')
    })
    .then(() =&gt; {
        console.log('2')
    })
    .catch(() =&gt; {
        console.log('3')
    })
    .then(() =&gt; {
        console.log('4')
    });
</code></pre>


# Coding Challenge

Write a simple `Promise` that will immediately resolve and prints the required string to the console.

> Run your code in the **browser's dev tools** and when you feel contented, click **show solution** to compare it with my solution.

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

Quiz #

What is a `Promise`?

Quiz

Quiz #

What is a Promise?

What is a `Promise`?