1. Pick your starting point
Start with beginner categories and complete one exercise set at a time.
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2. Get instant feedback
Write real TypeScript code in the browser and get auto-graded feedback immediately.
3. Move up by difficulty
Progress from beginner to advanced categories using the recommended path.
Recommended path
Follow this sequence for the fastest ramp from basics to advanced TypeScript.
Step 1Easy
Primitives
TypeScript builds on JavaScript by adding types, so we can describe exactly what kind of values a
5 challenges
StartStep 2Easy
Functions Basics
Functions are how we structure behavior. In TypeScript, you can describe parameter types and return
6 challenges
StartStep 3Easy
Object Types Basics
Objects model real-world entities. In TypeScript, you describe an object's shape by listing its
6 challenges
StartStep 4Easy
Arrays
Arrays are ordered lists of values written as T[] or Array<T>: `typescript const numbers: number[]
6 challenges
StartStep 5Easy
Union & Litteral Types
Union types let a value be one of several possibilities, while literal types restrict values to
5 challenges
StartStep 6Easy
Type Aliases
Type aliases give a name to any type so you can reuse it throughout your code: `typescript type
6 challenges
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Intermediate