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JS Fundamentals in JavaScript

The building blocks every JavaScript developer needs to know. Start here.

Lessons in this section

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Begin with Variables & Constants.

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Other topics

Functions

3 lessons

Objects & Arrays

3 lessons

The `this` Keyword

1 lesson

Async JavaScript

4 lessons

Modern JavaScript (ES6+)

3 lessons

How JS Engine Works

3 lessons

DOM & Events

2 lessons

Bundlers & Build Tools

3 lessons

Rendering Techniques

2 lessons