vue实现公告栏文字上下滚动效果

<template>
  <div>
    <h2>公告栏文字停顿滚动</h2>
    <div class="textBox">
      <transition name="slide">
        <p class="text" :key="text.id">{{text.val}}</p>
      </transition>
    </div>
  </div>
</template>

<script>
export default {
  name: 'scroll',
  data () {
    return {
      textArr: [
        '1 第一条公告',
        '2 第二条公告第二条公告',
        '3 第三条公告第三条公告第三条公告'
      ],
      number: 0
    }
  },
  computed: {
    text () {
      return {
        id: this.number,
        val: this.textArr[this.number]
      }
    }
  },
  mounted () {
    this.startMove()
  },
  methods: {
    startMove () {
      // eslint-disable-next-line
      let timer = setTimeout(() => {
        if (this.number === 2) {
          this.number = 0;
        } else {
          this.number += 1;
        }
        this.startMove();
      }, 2000); // 滚动不需要停顿则将2000改成动画持续时间
    }
  }
}
</script>

<style scoped>
  h2 {
    padding: 20px 0
  }
  .textBox {
    width: 100%;
    height: 40px;
    margin: 0 auto;
    overflow: hidden;
    position: relative;
    text-align: center;
  }
  .text {
    width: 100%;
    position: absolute;
    bottom: 0;
  }
  .slide-enter-active, .slide-leave-active {
    transition: all 0.5s linear;
  }
  .slide-enter{
    transform: translateY(20px) scale(1);
    opacity: 1;
  }
  .slide-leave-to {
    transform: translateY(-20px) scale(0.8);
    opacity: 0;
  }
</style>