vue 点击左右滑动

<template>
  <div class="nav-bottom">
    <span class="prev">
      <i class="el-icon-arrow-left" @click="prenHandle"></i>
    </span>
    <div class="content">
      <ul :style="{ transform: 'translateX(' + left + 'px)' }">
        <li v-for="(item, index) in 20" :key="index">
          <p>{
   
   { item }}</p>
        </li>
      </ul>
    </div>
    <span class="next">
      <i class="el-icon-arrow-right" @click="nextHandle"></i>
    </span>
  </div>
</template>

<script>
export default {
  data() {
    return {
      width: 0,
      left: 0,
      index: 1
    };
  },
  watch: {},
  methods: {
    prenHandle() {
      if (this.index == 0) return;
      this.index++;
      this.left = this.index * 134;
    },
    nextHandle() {
      if (this.index == -15) return;
      this.index--;
      this.left = this.index * 134;
    }
  },
  mounted() {
    this.width = this.width * 20;
  }
};
</script>

<style rel="stylesheet/scss" lang="scss" scoped>
.nav-bottom {
  width: 750px;
  height: 110px;
  display: flex;
  justify-content: space-around;
  position: relative;
  text-align: center;
  background: rgba(2, 27, 52, 0.7);
  border-radius: 10px;
  .content {
    width: 660px;
    height: 70px;
    margin-top: 20px;
    overflow: hidden;
    ul {
      display: flex;
      width: 320px;
      height: 70px;
      li {
        width: 124px;
        height: 70px;
        line-height: 70px;
        display: flex;
        margin-right: 10px;
        flex-direction: column;
        flex-shrink: 0;
        text-align: center;
        color: #fff;
        background: #090;
      }
    }
  }
  span {
    width: 45px;
    height: 110px;
    line-height: 110px;
    font-size: 28px;
    color: #0293d9;
    i {
      cursor: pointer;
    }
  }
  .prev {
    float: left;
  }
  .next {
    float: right;
  }
}
</style>