shadcn-ui/examples/playground/hooks/use-mutation-observer.ts

import * as React from "react"

export const useMutationObserver = (
  ref,
  callback,
  options = {
    attributes: true,
    characterData: true,
    childList: true,
    subtree: true,
  }
) => {
  React.useEffect(() => {
    if (ref.current) {
      const observer = new MutationObserver(callback)
      observer.observe(ref.current, options)
      return () => observer.disconnect()
    }
  }, [ref, callback, options])
}