vue 无缝无限滚动横条实现

原理

复制1份需要无限滚动的列表，当滚动到第一个列表的结尾处（第二个列表的开始处时），立刻替换位移到初始位置（x=0）由于当时场景与刚开始的场景完全相同，就实现了无缝滚动

demo：

<template>
  <div>
    <div class="scroll-temp">
      <div class="temp-box" ref="temp">
        <div v-for="v in 5" :key="v + '1'" class="li">
          {{ "name" + v }} 当前温度：<span :class="v.ts">{{ v }}℃</span>
          湿度：<span :class="v.hs">{{ v }}%</span>
        </div>
        <div v-for="v in 5" :key="v + '2'" class="li">
          {{ "name" + v }} 当前温度：<span :class="v.ts">{{ v }}℃</span>
          湿度：<span :class="v.hs">{{ v }}%</span>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
let x = 0;
export default {
  data() {
    return {
      tempInterval: undefined
    };
  },
  components: {},
  computed: {},
  destroyed() {
    clearInterval(this.tempInterval);
  },
  mounted() {
    this.tempInterval = setInterval(this.rollTemp, 50);
  },
  methods: {
    rollTemp() {
      let all = 0;
      let count = this.$refs.temp.childElementCount;
      for (let i = 0; i < count; i++) {
        all += this.$refs.temp.children[i].offsetWidth;
      }
      let half = all >> 1;
      if (x < 1 - half) {
        x = 0;
      }
      x -= 2;
      this.$refs.temp.style.transform = "translateX(" + x + "px)";
    }
  }
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="scss" rel="stylesheet/scss">
.scroll-temp {
  background:black;
  font-size: 20px;
  top: 100px;
  left: 480px;
   980px;
  color: #fff;
  height: 30px;
  line-height: 30px;
  overflow: hidden;
  .temp-box {
    white-space: nowrap;
    .li {
      display: inline;
      height: 30px;
      padding-right: 20px;
    }
  }
}
</style>