Javascript

Introduction to javascript programming 

JavaScript allows changing HTML Styles (CSS), also it helps to hid or show HTML Elements.

The JS code should be always putted between <script> and </script> tags

To call the JS code from an external file ; <script src="myScript.js"></script> to be putted in head or body

The JS files have as  extension .js.

JavaScript can "display" data in different ways:

• In  an alert box, using window.alert().
• In the HTML output using document.write().
• In the HTML element, using innerHTML.
• in the browser console, using console.log().

A JS program contains several statements or operation to be called when this program is executed.

A JS program contains: Values, Operators, Expressions, Keywords, and Comments.

Codes after d // or between /**/ are not executed and treated as a comment.

In JS a 3D drawing can be done  using the WebGL API and is also possible in  <canvas>, free platform for that :   BabylonJS and ThreeJS
All about canvas: https://simon.html5.org/dump/html5-canvas-cheat-sheet.html