vue模块拖拽效果的实现代码

<template>
    <div>
      <div @mousedown="move($event,index)" v-for="(x,index) in i">
        <span v-if="index+1 !== i.length">{{index+1}}</span>
        <input v-model="x.input">
      </div>
      {{i}}
    </div>
</template>

<script>
    export default {
        name: "index",
      data(){
          return{
            positionX:0,
            positionY:0,
            i:[
              {input:''}
            ]
          }
      },
      methods:{
          move(e,x){
            let odiv = e.target;        //获取目标元素
            //算出鼠标相对元素的位置
            let disX = e.clientX - odiv.offsetLeft;
            let disY = e.clientY - odiv.offsetTop;
            let flag = true;
            document.onmousemove = (e)=>{       //鼠标按下并移动的事件
              if(flag && x === this.i.length-1){
                flag = false;
                this.i.push({input:''})
              }
              //用鼠标的位置减去鼠标相对元素的位置，得到元素的位置
              let left = e.clientX - disX;
              let top = e.clientY - disY;
              //绑定元素位置到positionX和positionY上面
              this.positionX = top;
              this.positionY = left;
              //移动当前元素
              odiv.style.left = left + 'px';
              odiv.style.top = top + 'px';
            };
            document.onmouseup = (e) => {
              document.onmousemove = null;
              document.onmouseup = null;
            };
          }
      }
    }
</script>

<style scoped>
  .view{
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: #f8f8f8;
    .x{
      width: 250px;
      height: 50px;
      top: 50px;
      left: 10px;
      position: absolute;
      background: red;
      color: yellow;
    }
  }
</style>