Lessons
TypeScript · Easy
TypeScript · Easy. Ten lessons. Open-book quizzes. Lesson 1 free.
10 lessons · The Host · Lesson 1 free
Pass all ten lessons for the certificate. Sample · Claim
Lesson 1 · On the house
Generics on functions
Type parameters that stay honest.
Lesson 2
keyof and indexed access
Types from keys.
Lesson 3
Utility types
Partial, Pick, Omit.
Lesson 4
Type predicates
Custom narrowing.
Lesson 5
Promise types
async/await typing.
Lesson 6
Strictness flags
strict and friends.
Lesson 7
Declaration files
.d.ts sketch.
Lesson 8
satisfies operator
Check without widening.
Lesson 9
Mapped types
Transform properties.
Lesson 10
Easy capstone
Generic pluck.
Sample certificate
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Certificate
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