vue怎么实现滑动验证条

<template>
  <div
    ref="dragDiv"
    class="drag"
  >
    <div ref="drag_bg" class="drag_bg" />
    <div ref="drag_text" class="drag_text">{{ confirmWords }}</div>
    <div class="slide-check-tip">请滑动验证</div>
    <div
      ref="moveDiv"
      :class="{'handler_ok_bg':confirmSuccess}"
      class="handler handler_bg"
      
      @mousedown="mousedownFn($event)"
    />
  </div>
</template>

<script>
export default {
  data() {
    return {
      beginClientX: 0, /* 距离屏幕左端距离 */
      mousePressing: false, /* 是否正则按压滑动条 */
      maxwidth: '', /* 拖动最大宽度，依据滑块宽度算出来的 */
      confirmWords: '按住滑块，拖动到最右边', /* 滑块文字 */
      confirmSuccess: false /* 验证成功判断 */
    };
  },
  mounted() {
    document.getElementsByTagName('html')[0].addEventListener('mousemove', this.mouseMoveFn);
    document.getElementsByTagName('html')[0].addEventListener('mouseup', this.moseUpFn);
  },
  methods: {
    mousedownFn: function(e) {
      console.log(' mousedownFn ');
      this.initMaxWidth();
      if (!this.confirmSuccess) {
        e.preventDefault && e.preventDefault(); // 阻止文字选中等 浏览器默认事件
        this.mousePressing = true;
        this.beginClientX = e.clientX;
      }
    }, // mousedoen 事件
    successFunction() {
      this.confirmSuccess = true;
      this.confirmWords = '验证通过';
      if (window.addEventListener) {
        document.getElementsByTagName('html')[0].removeEventListener('mousemove', this.mouseMoveFn);
        document.getElementsByTagName('html')[0].removeEventListener('mouseup', this.moseUpFn);
      } else {
        document.getElementsByTagName('html')[0].removeEventListener('mouseup', () => { });
      }
      this.$refs.drag_text.style.color = '#fff';
      this.$refs.moveDiv.style.left = this.maxwidth + 'px';
      this.$refs.drag_bg.style.width = this.maxwidth + 'px';
    }, // 验证成功函数
    mouseMoveFn(e) {
      if (this.mousePressing) {
        console.log('mouseMoveFn');
        const width = e.clientX - this.beginClientX;
        if (width > 0 && width <= this.maxwidth) {
          this.$refs.moveDiv.style.left = width + 'px';
          this.$refs.drag_bg.style.width = width + 'px';
        } else if (width > this.maxwidth) {
          this.successFunction();
        }
      }
    }, // mousemove事件
    moseUpFn(e) {
      console.log('moseUpFn');
      this.mousePressing = false;
      var width = e.clientX - this.beginClientX;
      if (width < this.maxwidth) {
        // document.getElementsByClassName('handler')[0].style.left = 0 + 'px'
        // document.getElementsByClassName('drag_bg')[0].style.width = 0 + 'px'
        this.$refs.moveDiv.style.left = 0 + 'px';
        this.$refs.drag_bg.style.width = 0 + 'px';
      }
    }, // mouseup事件,
    initMaxWidth() {
      this.maxwidth = this.$refs.dragDiv.clientWidth - this.$refs.moveDiv.clientWidth;
      // this.maxwidth = 338
    },
    // 将滑动条重新至于最左侧
    reset() {
      this.$refs.moveDiv.style.left = 0 + 'px';
      this.$refs.drag_bg.style.width = 0 + 'px';
      this.$refs.drag_text.style.color = '#333';
      this.confirmSuccess = false;
      this.mousePressing = false;
      this.maxwidth = this.$refs.dragDiv.clientWidth - this.$refs.moveDiv.clientWidth;
      document.getElementsByTagName('html')[0].addEventListener('mousemove', this.mouseMoveFn);
      document.getElementsByTagName('html')[0].addEventListener('mouseup', this.moseUpFn);
    }
  }
};
</script>

<style scoped>
.slide-check-tip{
  position: absolute;
  display: inline-block;
  top: 0px;
  right: -85px;
  /* border: 1px solid red; */
  color: #999;
  font-size: smaller;
}
.drag {
  position: relative;
  background-color: #e8e8e8;
  width: 70%;
  height: 34px;
  line-height: 34px;
  text-align: center;
}
.handler {
  width: 40px;
  height: 32px;
  border: 1px solid #ccc;
  cursor: move;
}
.handler_bg {
  background: #fff
    url('data:image/png;base64,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')
    no-repeat center;
}
.handler_ok_bg {
  background: #fff
    url('data:image/png;base64,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')
    no-repeat center;
}
.drag_bg {
  background-color: #7ac23c;
  height: 34px;
  width: 0px;
}
.drag_text {
  position: absolute;
  top: 0px;
  width: 100%;
  color: #333;
  text-align: center;
  -moz-user-select: none;
  -webkit-user-select: none;
  user-select: none;
  -o-user-select: none;
  -ms-user-select: none;
}
</style>