reakit-utils/src/useUpdateEffect.ts

Reakit utils

import * as React from "react";

/**
 * A `React.useEffect` that will not run on the first render.
 */
export function useUpdateEffect(
  effect: React.EffectCallback,
  deps?: ReadonlyArray<any> | undefined
) {
  const mounted = React.useRef(false);
  React.useEffect(() => {
    if (mounted.current) {
      return effect();
    }
    mounted.current = true;
    return undefined;
  }, deps);
}