ai-toolkit

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ai-toolkit / ui /src /hooks /useFromNull.tsx

boilerplate

fcc02a2 verified over 1 year ago

484 Bytes

import { useEffect, useRef } from 'react';

export function useFromNull(effect: () => void | (() => void), deps: Array<any | null | undefined>) {
  const prevDepsRef = useRef<(any | null | undefined)[]>([]);

  useEffect(() => {
    const shouldRun = deps.some((dep, i) => prevDepsRef.current[i] == null && dep != null);

    if (shouldRun) {
      const cleanup = effect();
      prevDepsRef.current = deps;
      return cleanup;
    }

    prevDepsRef.current = deps;
  }, deps);
}

	import { useEffect, useRef } from 'react';

	export function useFromNull(effect: () => void \| (() => void), deps: Array<any \| null \| undefined>) {
	const prevDepsRef = useRef<(any \| null \| undefined)[]>([]);

	useEffect(() => {
	const shouldRun = deps.some((dep, i) => prevDepsRef.current[i] == null && dep != null);

	if (shouldRun) {
	const cleanup = effect();
	prevDepsRef.current = deps;
	return cleanup;
	}

	prevDepsRef.current = deps;
	}, deps);
	}