React hooks utilities.

hooks.ts

import { useEffect, useRef } from "react";

// Runs only on update, not on initial render, unlike useEffect.
// Handy replacement for componentDidUpdate().
export function useUpdateEffect(
  effect: React.EffectCallback,
  deps?: React.DependencyList
): void {
  const didMountRef = useRef(false);

  useEffect(() => {
    if (didMountRef.current) {
      effect();
    } else {
      didMountRef.current = true;
    }
  }, deps);
}