nova28
0243663ec6
Co-authored-by: nova28 <17953305+nova28@users.noreply.github.com> Co-authored-by: Carlos Florencio <carlosmflorencio@gmail.com>
17 lines
741 B
TypeScript
17 lines
741 B
TypeScript
import { useCallback, useRef } from "react";
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/**
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* Ordering guard for async work that can overlap (a WS trigger firing
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* again before a prior GET resolves, ordinary network jitter). `begin()`
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* stamps a new generation before starting the work; `isCurrent(token)`
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* reports whether no newer call has started since — even if this call's
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* response arrives after a more recent call's response, so callers can
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* discard it instead of overwriting fresher state with stale data.
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*/
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export function useLatestOnly() {
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const generationRef = useRef(0);
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const begin = useCallback(() => ++generationRef.current, []);
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const isCurrent = useCallback((token: number) => token === generationRef.current, []);
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return { begin, isCurrent };
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}
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