mirror of
https://github.com/MBombeck/HealthLog.git
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Marc-André Bombeck
b4e3e22d43
The mood and dashboard prefetches and the sign-in location lookup raced their work against a bare setTimeout that was never cleared, leaving one live timer behind per render or sign-in after the work had already answered. A shared helper races the work and clears the timer.
25 lines
812 B
TypeScript
25 lines
812 B
TypeScript
/**
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* Wait for `work` at most `ms`, then settle with `fallback` instead.
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*
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* The budget timer is cleared as soon as either side settles. A bare
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* `Promise.race` against a `setTimeout` left the timer running after the
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* work had long answered: one live timer per server render or per audited
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* sign-in, each holding its closure until it fired. `work` is not
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* cancelled; a rejection of `work` inside the budget rejects here too.
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*/
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export async function settleWithin<T, F>(
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work: Promise<T>,
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ms: number,
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fallback: F,
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): Promise<T | F> {
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let timer: ReturnType<typeof setTimeout> | undefined;
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const budget = new Promise<F>((resolve) => {
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timer = setTimeout(() => resolve(fallback), ms);
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});
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try {
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return await Promise.race([work, budget]);
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} finally {
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clearTimeout(timer);
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}
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}
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