vue添加视频背景（登陆页面视频背景）

<template>
  <div class="homepage-hero-module">

    <div class="login-container">
      <el-form ref="loginForm" :model="loginForm" :rules="loginRules" class="login-form" auto-complete="on"
               label-position="left">
        <div class="title-container">
          <h3 class="title">管理员登录</h3>
        </div>
        <el-form-item prop="username">
        <span class="svg-container svg-container_login">
          <svg-icon icon-class="user"/>
        </span>
          <el-input v-model="loginForm.username" name="username" type="text" auto-complete="on" placeholder="username"/>
        </el-form-item>

        <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password"/>
        </span>
          <el-input :type="passwordType" v-model="loginForm.password" name="password" auto-complete="on"
                    placeholder="password" @keyup.enter.native="handleLogin"/>
          <span class="show-pwd" @click="showPwd">
          <svg-icon icon-class="eye"/>
        </span>
        </el-form-item>

        <el-button :loading="loading" type="primary" style="width:100%;margin-bottom:30px;"
                   @click.native.prevent="handleLogin">登录
        </el-button>

        <div style="position:relative">
          <div class="tips">
            <span> 超级管理员用户名: admin123</span>
            <span> 超级管理员用户名：admin123</span>
          </div>
          <div class="tips">
            <span> 商城管理员用户名: mall123</span>
            <span> 商城管理员用户名：mall123</span>
          </div>
          <div class="tips">
            <span> 推广管理员用户名: promotion123</span>
            <span> 推广管理员用户名：promotion123</span>
          </div>
        </div>
      </el-form>
    </div>
    <div class="video-container">
      <div :style="fixStyle" class="filter"></div>
      <video :style="fixStyle" autoplay loop class="fillWidth" v-on:canplay="canplay" muted>
        <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="背景">
      </div>
    </div>
  </div>

</template>

<script>
  import mp4Path from "../../assets/background/hanging/Hanging.mp4"
  import webmPath from "../../assets/background/hanging/Hanging.webm"
  import jpegPath from "../../assets/background/hanging/Hanging.jpg"

    export default {
        name: 'login',
        data() {
            const validatePassword = (rule, value, callback) => {
                if (value.length < 6) {
                    callback(new Error('管理员密码长度应大于6'))
                } else {
                    callback()
                }
            }
            return {
                vedioCanPlay: false,
                fixStyle: '',
                PATH_TO_MP4: '',
                PATH_TO_WEBM: '',
                PATH_TO_JPEG: '',
                loginForm: {
                    username: 'admin123',
                    password: 'admin123'
                },
                loginRules: {
                    username: [{required: true, message: '管理员账户不允许为空', trigger: 'blur'}],
                    password: [
                        {required: true, message: '管理员密码不允许为空', trigger: 'blur'},
                        {validator: validatePassword, trigger: 'blur'}
                    ]
                },
                passwordType: 'password',
                loading: false
            }
        },
        watch: {
            $route: {
                handler: function (route) {
                    this.redirect = route.query && route.query.redirect
                },
                immediate: true
            }

        },
        created() {
            window.addEventListener('hashchange', this.afterQRScan)

            this.PATH_TO_JPEG = jpegPath
            this.PATH_TO_MP4 = mp4Path
            this.PATH_TO_WEBM = webmPath
        },
        destroyed() {
            window.removeEventListener('hashchange', this.afterQRScan)
        },
        methods: {
            canplay() {
                this.vedioCanPlay = true
                console.log(this.vedioCanPlay);
            },
            showPwd() {
                if (this.passwordType === 'password') {
                    this.passwordType = ''
                } else {
                    this.passwordType = 'password'
                }
            },
            handleLogin() {
                this.$refs.loginForm.validate(valid => {
                    if (valid && !this.loading) {
                        this.loading = true
                        this.$store.dispatch('LoginByUsername', this.loginForm).then(() => {
                            this.loading = false
                            this.$router.push({path: this.redirect || '/'})
                        }).catch(response => {
                            this.$notify.error({
                                title: '失败',
                                message: response.data.errmsg
                            })
                            this.loading = false
                        })
                    } else {
                        return false
                    }
                })
            }
        },
        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>

<style rel="stylesheet/scss" lang="scss">
  $bg: #2d3a4b;
  $light_gray: #eee;

  /* reset element-ui css */
  .login-container {
    .el-input {
      display: inline-block;
      height: 47px;
      width: 85%;


      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;

        &:-webkit-autofill {
          box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
          -webkit-text-fill-color: #fff !important;
        }
      }
    }

    .el-form-item {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }
  }
</style>

<style rel="stylesheet/scss" lang="scss" scoped>
  $bg: #2d3a4b;
  $dark_gray: #889aa4;
  $light_gray: #eee;

  .login-container {
    position: fixed;
    height: 100%;
    width: 100%;
    z-index: 9999;

    .login-form {
      position: absolute;
      left: 0;
      right: 0;
      width: 520px;
      padding: 35px 35px 15px 35px;
      margin: 120px auto;
      z-index: 9999;
    }

    .tips {
      font-size: 14px;
      color: #fff;
      margin-bottom: 10px;

      span {
        &:first-of-type {
          margin-right: 16px;
        }
      }
    }

    .svg-container {
      padding: 6px 5px 6px 15px;
      color: $dark_gray;
      vertical-align: middle;
      width: 30px;
      display: inline-block;

      &_login {
        font-size: 20px;
      }
    }

    .title-container {
      position: relative;

      .title {
        font-size: 26px;
        font-weight: 400;
        color: $light_gray;
        margin: 0px auto 40px auto;
        text-align: center;
        font-weight: bold;
      }
    }

    .show-pwd {
      position: absolute;
      right: 10px;
      top: 7px;
      font-size: 16px;
      color: $dark_gray;
      cursor: pointer;
      user-select: none;
    }
  }

  .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>