Vue中 iframe 的内容加载慢，实现加载（Loading）效果

<template>
  <div style="height:1000px;" v-loading="loading">
    <iframe 
      ref="Iframe" 
      src="https://www.taobao.com/" 
      width="100%" 
      height="100%" 
      frameborder="0">
    </iframe>
  </div>
</template>
<script>
export default {
  data() {
    return {
      loading: false,
    };
  },
  methods: {
    iframeLoad(){
      this.loading = true;
      const iframe = this.$refs.Iframe;
      if (iframe.attachEvent) { // IE
        iframe.attachEvent('onload', () => { this.loading = false; });
      } else { // 非IE
        iframe.onload =  () => { this.loading = false; };
      }
    }
  },
  mounted() {
    this.iframeLoad();
  },
};
</script>