基于 Vue.js 2.0 酷炫自适应背景视频登录页面实现

<template>
 <div class="homepage-hero-module">
 <div class="video-container">
 <div :style="fixStyle" class="filter"></div>
 <video :style="fixStyle" aulay loop class="fillWidth" v-on:canplay="canplay">
 <source src="PATH_TO_MP4" type="video/mp4"/>
 浏览器不支持 video 标签，建议升级浏览器。
 <source src="PATH_TO_WEBM" type="video/webm"/>
 浏览器不支持 video 标签，建议升级浏览器。
 </video>
 <div class="poster hidden" v-if="!vedioCanPlay">
 <img :style="fixStyle" src="PATH_TO_JPEG" alt="">
 </div>
 </div>
 </div>
</template>

<style scoped>
 .homepage-hero-module,
 .video-container {
 position: relative;
 height: 100vh;
 overflow: hidden;
 }
 .video-container .poster img,
 .video-container video {
 z-index: 0;
 position: absolute;
 }
 .video-container .filter {
 z-index: 1;
 position: absolute;
 background: rgba(0, 0, 0, 0.4);
 }
</style>

<script>
 export default {
 name: 'login',
 data() {
 return {
 vedioCanPlay: false,
 fixStyle: ''
 }
 },
 methods: {
 canplay() {
 this.vedioCanPlay = true
 }
 },
 mounted: function() {
 window.onresize = () => {
 const windowWidth = document.body.clientWidth
 const windowHeight = document.body.clientHeight
 const windowAspectRatio = windowHeight / windowWidth
 let videoWidth
 let videoHeight
 if (windowAspectRatio < 0.5625) {
  videoWidth = windowWidth
  videoHeight = videoWidth  0.5625
  this.fixStyle = {
  height: windowWidth  0.5625 + 'px',
  width: windowWidth + 'px',
  'margin-bottom': (windowHeight - videoHeight) / 2 + 'px',
  'margin-left': 'initial'
  }
 } else {
  videoHeight = windowHeight
  videoWidth = videoHeight / 0.5625
  this.fixStyle = {
  height: windowHeight + 'px',
  width: windowHeight / 0.5625 + 'px',
  'margin-left': (windowWidth - videoWidth) / 2 + 'px',
  'margin-bottom': 'initial'
  }
 }
 }
 window.onresize()
 }
 }
</script>