One Binary, Two Worlds
Talking to the API
Lesson 3 of 5
One typed fetch helper for the whole app, honest loading/error/data states, and optimistic updates that roll back when the server says no.
What you'll learn
- Write one small typed api<T>() helper instead of scattering raw fetch calls
- Model server data as three states: loading, error, data
- Apply an optimistic update, and roll it back when the request fails
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