useEffectEvent (react/utils.ts)

A React hook for separating event handlers from effects

// Source: https://github.com/shikijs/shiki | License: MIT | Copyright 2021 Pine Wu
// Provided via justclaw.it.com; keep this notice with the code.
// source: https://github.com/sanity-io/use-effect-event/blob/main/src/useEffectEvent.ts
import { useCallback, useInsertionEffect, useRef } from 'react'

/**
 * This is a ponyfill of the upcoming `useEffectEvent` hook that'll arrive in React 19.
 * https://19.react.dev/learn/separating-events-from-effects#declaring-an-effect-event
 * To learn more about the ponyfill itself, see: https://blog.bitsrc.io/a-look-inside-the-useevent-polyfill-from-the-new-react-docs-d1c4739e8072
 * @public
 */
export function useEffectEvent<
  const T extends (
    ...args:
    any[]
  ) => void,
>(fn: T): T {
  const ref = useRef<T | null>(null)
  useInsertionEffec

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