INCS
Modules
Articles
News
Language
English
Français
العربية
▾
☰
Units
Modules
/
Beginner’s guide to JS
0 of 20 units done
Beginner’s guide to JS
×
20 units · Easy
Progress
0%
◆
Overview
1
What is JavaScript & how browsers run it
2
Variables & data types (let, const, strings, numbers, booleans)
3
Operators & expressions (arithmetic, comparison, logical)
4
Comments in JS
5
Conditionals (if, else if, else, switch)
6
Loops (for, while, for...of)
7
Writing & calling functions
8
Parameters, arguments & return values
9
Arrow functions
10
Arrays — creating, accessing, and looping
11
Objects — key-value pairs and dot notation
12
Array methods (map, filter, forEach)
13
The DOM — what it is and how JS reads it
14
Selecting & manipulating HTML elements
15
Events — clicks, inputs, and listeners
16
Forms & user input with JS
17
setTimeout & setInterval — timing
18
Working with JSON
19
Fetch API — loading data from the web
20
Debugging — console, errors, and DevTools
Unit 4 of 20
Comments in JS
Updated Jun 2026
This unit has no content yet.
←
Previous
Operators & expressions (arithmetic, comparison, logical)
Next
Conditionals (if, else if, else, switch)
→