lrnitFor React developers

Learn TypeScript in a course built only for you — and actually retain it.

Go beyond any: generics, discriminated unions, and the type patterns that make React components self-documenting and refactors fearless.

Free to start · no account needed

Built around your goal — not a catalog

What your course could open with

lrnit interviews you first — what you know, why you’re learning, how you think — then generates every lesson for that. Sample lessons from a course like yours:

01Props as contracts: typing components so misuse won’t compile
02Discriminated unions: modeling UI states that can’t be wrong
03Generics in practice: a typed useFetch you’ll actually reuse
04The migration playbook: converting a JS codebase without stopping ship
…and the rest is generated for you: your gaps, your pace, your job.

Measured, not watched

By the end, you’ll be able to

Type component APIs so misuse fails at compile time
Model loading/error/success states without impossible combinations
Migrate JavaScript code incrementally with confidence

Every lesson ends in assessment. Mastery is tracked per concept with spaced review, and the course adapts to what you actually retain — finishing means a timed final exam and a verifiable certificate, not a completion badge.

“It felt like the course already knew what I did for a living.”

Early lrnit learner

Your version of this course doesn’t exist yet.

Free to start · no account needed