Stage 01 · 01 · Foundations · skill 3 of 4

JavaScript fundamentals

Language of the web: values, functions, arrays, objects, and asynchrony.

Recommended first: HTML & CSS

After this you will be able to

• Use let/const, functions, and array methods
• Understand equality, truthiness, and this enough to not be surprised
• Fetch JSON and handle errors

javascript.info · why we picked it

Completing this unlocks: TypeScript fundamentals, React fundamentals, Node.js & HTTP APIs, Testing web apps