30 lines
802 B
TypeScript
30 lines
802 B
TypeScript
const inflight = new Map<string, Promise<Response>>()
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export function useDeduplicatedFetch() {
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async function dedupFetch(url: string, options?: RequestInit): Promise<Response> {
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// Generate a cache key from URL + body
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const bodyStr = options?.body ? String(options.body) : ''
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const key = `${options?.method ?? 'GET'}:${url}:${bodyStr}`
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const existing = inflight.get(key)
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if (existing) return existing.then(r => r.clone())
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const controller = new AbortController()
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const mergedOptions = { ...options, signal: controller.signal }
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const promise = fetch(url, mergedOptions).finally(() => {
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inflight.delete(key)
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})
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inflight.set(key, promise)
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return promise
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}
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function cancelAll() {
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inflight.clear()
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}
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return { dedupFetch, cancelAll }
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}
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