Topic

Web APIs

A Web API example is not finished when the happy-path console log appears. We test cancellation, cleanup, missing data, HTTP failure, repeated clicks, and the moment a user leaves while the network is still thinking about it.

Web APIs · 2026-07-19

Cancel Fetch Requests with AbortController

Cancel a fetch request by creating an `AbortController` and passing its `signal` to `fetch()`, then calling `controller.abort()` when the user cancels, a…