进入页面右下角出现提示，只出现一次，1分钟后自动关闭

用sessionStorage来存储状态的
代码

<!--右下角提示-->
    <div class="br-notice" v-show="shorbrNotice" :class="{ noticeHide: !showbrFadeOut}">
      <div class="br-title clearfloat">
        <div class="g-f-l">温馨提示</div>
        <div class="g-f-r br-close" @click="closebrNotice()">×</div>
      </div>
      <div class="br-txt clearfloat">
       内容内容内容内容内容内容内容内容
       内容内容内容内容内容内容内容内容
       内容内容内容内容内容内容内容内容
       内容内容内容内容内容内容内容内容
       内容内容内容内容内容内容内容内容
      </div>
    </div>

js

data () {
    return {
      shorbrNotice:true,
      showbrFadeOut:true,
    }
  },
  mounted(){
    if (JSON.parse(sessionStorage.getItem('shorbrNotice')) !== null) {
      if (JSON.parse(sessionStorage.getItem('shorbrNotice'))) {
        this.shorbrNotice = false
      } else {
        this.shorbrNotice = true
      }
    }
    let that = this
    setTimeout(function () {
      that.showbrFadeOut = false
      sessionStorage.setItem('shorbrNotice', true)
    }, 60000)
  },
  methods: {
    closebrNotice() {
      sessionStorage.setItem('shorbrNotice', true)
      this.showbrFadeOut = false
    }
  }

css

* {
  box-sizing: border-box;
}
.g-f-l {
  float: left;
}
.g-f-r {
  float: right;
}
.clearfloat::after{display:block;clear:both;content:"";visibility:hidden;height:0}
.clearfloat{zoom:1}
.br-notice {
  position: fixed;
  right: 28px;
  width: 312px;
  background-color: #fff;
  animation: fadeBottomIn 1.5s 0.2s linear;
  animation-fill-mode: both;
  border-radius: 8px;
  border: solid 1px #ececec;
}
@keyframes fadeBottomIn {
  0% {
    bottom: -33%;
    opacity: 0;
  }
  100% {
    opacity: 1;
    bottom: 4%;
    z-index: 10;
  }
}
.br-txt {
  background-color: #fff;
  padding: 20px;
}
.br-notice.noticeHide {
  animation: fadeBottomOut 0.8s 0.3s linear;
  animation-fill-mode: both;
}
@keyframes fadeBottomOut {
  0% {
    bottom: 4%;
    opacity: 1;
  }
  100% {
    bottom: -33%;
    opacity: 1;
  }
}
.br-title {
  width: 310px;
  line-height: 26px;
  padding-left: 12px;
  height: 26px;
  border-radius: 5px;
  background-color: #fbfbfb;
}
.br-close {
  margin-right: -20px;
  margin-top: -5px;
  font-size: 30px;
  cursor: pointer;
}
.br-close em{
  font-size: 18px;
  color: #C1C1C1;
  cursor: pointer;
}
.br-close em:hover {
  color: #409EFF;
}