| W3Schools |
W3Schools JavaScript Tutorial |
A simple, but comprehensive guide to all types of programming and scripting languages, including JavaScript. |
Variables Tutorial |
| MDN Web Docs |
MDN Web Docs JavaScript |
In-depth JavaScript documentation with guides for developers of varying proficiencies ranging from beginner to advanced. |
Expressions and Operators |
| Codecademy |
Codecademy JavaScript Courses |
Offers several courses, both free and paid, to learn different JavaScript concepts, ranging from the fundamentals to more specific, advanced uses. |
Learn Node.js |
| JavaScript.info |
The Modern JavaScript Tutorial |
A comprehensive guide on all things JavaScript. |
Events and Event Listeners |