<template>
 <div class="text-container">
  <transition class="" name="slide" mode="out-in">
   <p class="text" :key="text.id">{{text.val}}</p>
  </transition>
 </div>
</template>

<script>

export default {
 name: 'TextScroll',
 props: {
 dataList: {
  type: Array,
  default() {
  return [];
  },
 },
 },
 data() {
 return {
  count: 0, // 當(dāng)前索引
  intervalId: null, // 定時(shí)器ID
  playTime: 2000, // 定時(shí)器執(zhí)行間隔
 };
 },
 computed: {
 text() {
  return {
  id: this.count,
  val: this.dataList[this.count],
  };
 },
 },
 created() {
 this.intervalId = setInterval(() => { // 定義定時(shí)器
  this.getText();
 }, this.playTime);
 },
 methods: {
 getText() {
  const len = this.dataList.length; // 獲取數(shù)組長(zhǎng)度
  if (len === 0) {
  return; // 當(dāng)數(shù)組為空時(shí)，直接返回
  }
  if (this.count === len - 1) { // 當(dāng)前為最后一個(gè)時(shí)
  this.count = 0; // 從第一個(gè)開始
  } else {
  this.count++; // 自增
  }
 },
 },
 destroyed() {
 clearInterval(this.intervalId); // 清除定時(shí)器
 },
};
</script>

<style scoped>
.text-container{
 font-size: 14px;
 color: #F56B6B;
 margin-right: 20px;
 height: 60px;
}

.text {
 text-align: right;
 margin: auto 0;
}

.slide-enter-active, .slide-leave-active {
 transition: all 1s;
}

.slide-enter{
 transform: translateY(40px);
}

.slide-leave-to {
 transform: translateY(-40px);
}
</style>

<text-scroll :dataList="noticeList"></text-scroll>