Snippet

Async Generator Pipeline Control for Shielding React UI from Rate-Limit Flooding

Async Generators yield items asynchronously over time, enabling custom control flow algorithms for client-side rate limiting and request throttling in React. Consuming an `AsyncGenerator` with `for await...of` inside a cleanup-aware React `useEffect` hook ensures backpressure handling and prevents API flooding.

snippet.js

javascript

import { useEffect } from 'react';
 
async function* rateLimitedQueue(requests: string[], delayMs: number): AsyncGenerator<string, void, unknown> {
  for (const req of requests) {
    yield req;
    await new Promise(resolve => setTimeout(resolve, delayMs));
  }
}
 
export function useBatchProcessor(items: string[], onProcess: (item: string) => void) {
  useEffect(() => {
    let active = true;
    (async () => {
      for await (const item of rateLimitedQueue(items, 300)) {
        if (!active) break;
        onProcess(item);
      }
    })();
    return () => { active = false; };
  }, [items, onProcess]);
}

react

Breakdown

async function* rateLimitedQueue(requests: string[], delayMs: number): AsyncGenerator<string, void, unknown>

Creates an asynchronous generator function that yields items sequentially with enforced delay intervals.

for await (const item of rateLimitedQueue(items, 300)) {

Consumes the async generator iterable inside React's execution lifecycle while controlling request timing.

return () => { active = false; };

Implements an explicit cancellation flag to prevent state updates if the React component unmounts mid-stream.

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Async Generator Pipeline Control for Shielding React UI from Rate-Limit Flooding

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