如何在vue.js sfc根元素可见时将焦点设置为它(切换到v-show)

<template>
  <div ref="rootElement" v-show="isVisible">
    <!-- 组件内容 -->
  </div>
</template>

<script>
export default {
  data() {
    return {
      isVisible: false
    }
  },
  created() {
    this.$nextTick(() => {
      const rootElement = this.$refs.rootElement;
      const observer = new IntersectionObserver(entries => {
        const isVisible = entries[0].isIntersecting;
        if (isVisible) {
          rootElement.focus();
        }
      });
      observer.observe(rootElement);
    });
  }
}
</script>