Javascript course — What is Javascript, where can I use it?

Part #1: How to search for information, where I can try Javascript.

JavaScript is a cross-platform, scripting language used to make web pages interactive. (What is javascript on MDN)

JavaScript is a cross-platform source: https://youtu.be/5nmpokoRaZI?t=91

What is ECMAScript?

ECMAScript or ES is a standardized specification for a general purpose scripting language. JavaScript is a language that conforms to ECMAScript specification.

I search Javascript basics every day.

Where you can find information

Prefer JavaScript documentation on MDN (Mozilla developer network):

• Learn Web Development provides information for beginners and introduces basic concepts of programming and the Internet.
• JavaScript Guide (this guide) provides an overview of the JavaScript language and its objects.
• JavaScript Reference provides detailed reference material for JavaScript.

Bookmark JavaScript Reference on MDN in your browser. I highly recommend to not use W3school. There is even chrome extension to remove W3school from search results.

Run javascript in your browser

Console

• open console write "Hello world".

Learn more on https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Introduction#Getting_started_with_JavaScript

Repl.it

• you can click on the green button to run your embedded javascript code bellow
• you can open https://repl.it website and create new

Repl.it “Hello world” example

REPL: read => eval => print loop

• reading single user input => evaluates them => and then returns the result to the user
• The console is javascript REPL for browser developer tools
• Repl.it is a web platform providing REPL for various languages

Codesandbox

• more then a REPL, it will provide us full-featured editor to write React in the browser

React example using codesandbox.io

Continue here

Javascript course — Language basics, variables, data types