自定义滑块Vue组件

<div class="audio">
     <audio id="audio" ref="audio" src="http://www.w3school.com.cn/i/horse.ogg"></audio>
     <div class="stopbtn" @click="play" v-if="flag"></div>
     <div class="playbtn" @click="paused" v-else></div>
     <div class="timebar" ref="timebare" @touchmove="timebarmove($event)" @click="clickbar($event)">
       <div class="bar" ref="bar" @touchstart="touchstart($event)">
         <span></span>
       </div>
       <div class="mask" ref="mask"></div>
     </div>
     <div class="time">{{ currentTime }} / {{ alltime }}</div>
   </div>

data () {
    return {
      currentTime: 0,
      statu: false,
      ox: 0,
      left: 0,
      alltime: '',
      state: false,
      flag: true
    }
  },
  mounted () {
    var audio = document.getElementById('audio')
    audio.addEventListener('canplay', () => {
      this.alltime = audio.duration//获取总时长
    })
  },
  methods: {
    play () {
      this.flag = false
      let timer = setInterval(() => {
        this.currentTime += 1
        if (this.currentTime > this.alltime) {
          clearInterval(timer)
          this.currentTime = this.alltime
          this.flag = true
          this.currentTime = 0
        }
        this.$refs.bar.style.cssText = 'left:' + this.currentTime / this.alltime * 213 + 'px'
        this.$refs.mask.style.cssText = 'width:' + this.currentTime / this.alltime * 213 + 'px'
      }, 1000)
    },
    paused () {
      this.flag = false
    },
    touchstart (e) {
      this.ox = e.touches[0].pageX - this.left
      this.statu = true
    },
    timebarmove (e) {
      if (this.statu) {
        this.left = e.touches[0].pageX - Number(this.ox)
        if (this.left < 0) {
          this.left = 0
        }
        if (this.left > 213) {
          this.left = 213
        }
        this.$refs.bar.style.cssText = 'left:' + this.currentTime / this.alltime * 213 + 'px'
        this.$refs.mask.style.cssText = 'width:' + this.currentTime / this.alltime * 213 + 'px'
      }
    },
    clickbar (e) {
      if (!this.statu) {
        this.left = e.x - 82
        if (this.left < 0) {
          this.left = 0
        }
        if (this.left > 213) {
          this.left = 213
        }
        this.$refs.bar.style.cssText = 'left:' + this.currentTime / this.alltime * 213 + 'px'
        this.$refs.mask.style.cssText = 'width:' + this.currentTime / this.alltime * 213 + 'px'
      }
    },
    touchend () {
      this.statu = false
    }
  }