vue 进度条

今天做项目是需要写一个可拖拽进度条,就在网上搜着写了一个。

在公共样式里封装一个组件把代码放进去

template>
  div>
    div class="slider" ref="slider">
      div class="process" :style="{ width }">div>
      div class="thunk" ref="trunk" :style="{ left }">
        div class="block">div>
        div class="tips">
          i class="fas fa-caret-down">i>
        div>
        div class="c" id="talkbubble"> {{ per }}div>
      div>
    div>
   
  div>
template>
script>
/*
 * min 进度条最小值
 * max 进度条最大值
 * v-model 对当前值进行双向绑定实时显示拖拽进度
 */
export default {
 props: ["min", "max", "value"],
 data() {
  return {
   slider: null, //滚动条DOM元素
   thunk: null, //拖拽DOM元素
   per: this.value, //当前值
  };
 },
 //渲染到页面的时候
 mounted() {
  this.slider = this.$refs.slider;
  this.thunk = this.$refs.trunk;
  var _this = this;
  this.thunk.onmousedown = function (e) {
   var width = parseInt(_this.width);
   var disX = e.clientX;
   document.onmousemove = function (e) {
    // value, left, width
    // 当value变化的时候，会通过计算属性修改left，width

    // 拖拽的时候获取的新width
    var newWidth = e.clientX - disX + width;
    // 拖拽的时候得到新的百分比
    var scale = newWidth / _this.slider.offsetWidth;
    _this.per = Math.ceil((_this.max - _this.min) * scale + _this.min);
    _this.per = Math.max(_this.per, _this.min);
    _this.per = Math.min(_this.per, _this.max);
    _this.$emit("input", _this.per);
   };
   document.onmouseup = function () {
    document.onmousemove = document.onmouseup = null;
   };
   return false;
  };
 },
 computed: {
  // 设置一个百分比，提供计算slider进度宽度和trunk的left值
  // 对应公式为 当前值-最小值/最大值-最小值 = slider进度width / slider总width
  // trunk left = slider进度width + trunk宽度/2
  scale() {
   return (this.per - this.min) / (this.max - this.min);
  },
  width() {
   if (this.slider) {
    return this.slider.offsetWidth * this.scale + "px";
   } else {
    return 0 + "px";
   }
  },
  left() {
   if (this.slider) {
    return (
     this.slider.offsetWidth * this.scale -
     this.thunk.offsetWidth / 2 +
     "px"
    );
   } else {
    return 0 + "px";
   }
  },
 },
};
script>
style>
#talkbubble {
   width: 50px;
   margin-top: 10px;
   height: 30px;
   background: #000;
   position: relative;
   left: -10px;
   -moz-border-radius:    10px;
   -webkit-border-radius: 10px;
   border-radius:         10px;
   color: #fff;
   text-align: center;
   line-height: 30px;
   font-size: 12px;
}
#talkbubble:before {
   content:"";
   position: absolute;
   right: 100%;
   top: -10px;
   left: 20px;
   width: 0;
   height: 0;
   border-right: 5px solid transparent;
   border-bottom: 10px solid #000;
   border-left: 5px solid transparent;
}
.slider {
 user-select: none;
 position: relative;
 margin: 50px 50px;
 width: 400px;
 height: 10px;
 background: #e4e7ed;
 border-radius: 5px;
 cursor: pointer;
}
.slider .process {
 position: absolute;
 left: 0;
 top: 0;
 width: 254px;
 height: 10px;
 border-radius: 5px;
 background: #eab728;
}
.slider .thunk {
 position: absolute;
 left: 100px;
 top: -7px;
 width: 20px;
 height: 20px;
}
.slider .block {
 width: 20px;
 height: 20px;
 border-radius: 50%;
 border: 4px solid #fff;
 background: #eab728;
 transition: 0.2s all;
}
.slider .tips {
 position: absolute;
 left: -7px;
 bottom: 30px;
 min-width: 15px;
 text-align: center;
 padding: 4px 8px;
 border-radius: 5px;
 height: 24px;
 color: #fff;
}
.slider .tips i {
 position: absolute;
 margin-left: -5px;
 left: 50%;
 bottom: -9px;
 font-size: 16px;
 color: #000;
}
.slider .block:hover {
 transform: scale(1.1);
 opacity: 0.6;
}

style>

引用

template>
 slider :min="300" :max="90000" v-model="per">slider>
template>

script>
import slider from "@/components/slider";
export default {
 data() {
  return {};
 },
 computed: {
  per: {
   get() {
    return 0;
   },
   set(val) {
    console.log(val);
   },
  },
 },
 components: { slider },
 mounted() {},
 methods: {},
};
script>

style >
style>

看一下效果