Quickstart with ECMAScript 6

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1- What do you need?

Before starting fast with ECMAScript you should spend some time reading my introduction post on the ECMAScript, it provides you a better overview:
The  ES6 (ECMAScript 6) specification was announced in June 2015. It needs to wait for a period of time so that browsers support all new features. Therefore, to study  ES6 and be able to practise, you have 3 approaches:

1-Online Tool

To study  ECMAScript, you need to have an environment to execute the code written by you.  It is the simplest to use an online tool, for example, the following website:

2- Browser

To study  ES6, you need only a browser.  It's best to download the latest version of Chrome, Firefox, or Safari. At present, these browsers support all ES6 features.
You can look up browser support for ES6 at the following link:

3- NodeJS

NodeJS means an environment running  JavaScript ( JavaScript Runtime Environment) outside the browser. It contains  V8 Javascript Engine, a program written by  C++ helping analyze and execute  Javascript code. V8 is the  Javascript Engine of famous  Chrome browser.
Install the  NodeJS on your computer helping you to be able to execute the  Javascript code without browser. This is really useful for your studying  ECMAScript. One more important thing is that the  V8 Javascript Engine in the latest  NodeJS version can analyze and execute  ES7, ES8 ​​​​​​​codes.
Therefore, I advise you to install the NodeJS:

Text Editor?

To write the  ECMAScript code, you can use any "Text Editor" . I recommend that you use the Atom editor, which is a free, open source editor provided by the GitHub.

2- Learn ECMAScript with online tools

As I say above, to learn the  ECMAScript, you need an environment to execute the code written by you. It is the most simple to search a online tool to execute the  ECMAScript code, for example, the following website:
Write your ECMAScript and click on the button to execute it.
This tool also allows you to see how the code written by  ES6 is converted into  ES5 code.

3- Learn ECMAScript with Browser

As I say above, to study the  ECMAScript, you need only one browser, for example,  Firefox, Chrome, Safari, and should use the latest version.
Create a  HTML file, for example, h ello.html:
hello.html
<h3>View results on the browser's Console window</h3>

<script type="text/javascript">

   console.log("Hello World");

</script>
Open the  hello.html file on browser and you can see the results on the  Console window of the browser.

4- Learn ECMAScript with NodeJS

Creating a  NodeJS project will help you be more easy in studying the  ECMAScript. It is noted that you don't probably need to study the  NodeJS. You only need the  NodeJS as a tool to be able to execute the  Javascript codes without a browser.
First of all, create an empty directory, such as   node-ecmascript. Open the CMD and CD windows to enter the directory which you just created, and execute the following command to initialize a project:
# Init project:

npm init
Accept default options. Press  Enter, Enter,... Enter until completion:
package.json file has been just created in your directory.
Open your project directory on an editor. Here I use  Atom.
Create a  hello.js file:
hello.js
console.log("Hello World");
You have 2 ways for running this file:
Way 1: Open  CMD window and run the following command:
node hello.js
Way 2: Install  Atom Runner. This plugin allows you to run the script files such as  Javascript, Python,... directly on  Atom:

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