vue3动态ref

<div
            v-for="(item, i) in videoList"
            :key="i"
            :ref="(el) => setItemRef(el as HTMLDivElement, i)"

const setItemRef = (el: HTMLElement | null, index: number): void => {
  // 设置参数类型
  if (el) {
    const { toggle } = useFullscreen(el) // 绑定 useFullscreen
    fullscreenStates.value[index] = { toggle } // 存储全屏状态和切换方法
  }
}