Ian Flanigan 3048ec52e1 Interruptable spawn (#132) ... * Add `spawn` as a way of calling promise-returning blocks This change adds `spawn` which takes a no-argument, promise-returning function, calls it, and returns `void`. This makes it easy to call async blocks from `useEffect` and other places that don't take async functions, but also makes such calls explicit. * Adds interruptability to `spawn` Now, the task function passed to `spawn` can take an `Interrupted` argument, which is merely a method that returns `true` if the task should stop doing work. Likewise, `spawn` returns an `Interrupt` function that causes the `Interrupted` function to return `true`. * Change to using `AbortController` and `AbortSignal` Before, `spawn` used functions to interrupt and determine interruption state. Now, based on feedback from @whscullin, it uses `AbortController` and `AbortSignal`. Tests now show how the controller can be used to abort long-running tasks and API calls in the `spawn`. The also show how signals can be chained using `addEventListener`. * Fix `Apple2.tsx` Forgot to change it to use `AbortController` and `AbortSignal`. Co-authored-by: Will Scullin <scullin@scullin.com>		2022-06-12 09:06:58 -07:00
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promises.spec.ts	Interruptable spawn (#132)	2022-06-12 09:06:58 -07:00