Vue3+ts实现标签的拖拽

const drag = {
    mounted(el: HTMLElement) {
      let moveEl = el as HTMLElement
      const mouseDown = (e: MouseEvent) => {
        //鼠标点击物体那一刻相对于物体左侧边框的距离=点击时的位置相对于浏览器最左边的距离-物体左边框相对于浏览器最左边的距离
        // console.log(e.clientX, e.clientY, "-----起始", el.offsetLeft);
        let X = e.clientX - el.offsetLeft;
        let Y = e.clientY - el.offsetTop;
        const move = (e: MouseEvent) => {
          // 获取拖拽元素的位置
          let left = e.clientX - X;
          let top = e.clientY - Y;
          if (left <= 0) {
            left = 0
          } else if (left >= document.documentElement.clientWidth - el.offsetWidth) {
            left = document.documentElement.clientWidth - el.offsetWidth
          }
          if (top <= 0) {
            top = 0
          } else if (top > document.documentElement.clientHeight - el.offsetHeight) {
            top = document.documentElement.clientHeight - el.offsetHeight
          }
          el.style.left = left + "px";
          el.style.top = top + "px";
        };
        document.addEventListener("mousemove", move);
        document.addEventListener("mouseup", () => {
          document.removeEventListener("mousemove", move);
        });
      };
      moveEl.addEventListener("mousedown", mouseDown);
    },
  }
  const directives = {
    install: function (app: any) {
      app.directive('drag', drag)
    }
  }
  export default directives

<template>
  <div v-move class="box" style="text-align: right;">
    {{ positionX }}
    {{ positionY }}
  </div>
  <div v-move class="box" style="text-align: right;">
    {{ positionX }}
    {{ positionY }}
  </div>
  <div v-move class="box" style="text-align: right;">
    {{ positionX }}
    {{ positionY }}
  </div>
</template>
<script setup lang='ts'>
import { Directive, ref } from "vue";
let positionX = ref<number>(0)
let positionY = ref<number>(0)
const vMove: Directive = {
  mounted(el: HTMLElement) {
    // let moveEl = el.firstElementChild as HTMLElement;
    let moveEl = el as HTMLElement
    const mouseDown = (e: MouseEvent) => {
      //鼠标点击物体那一刻相对于物体左侧边框的距离=点击时的位置相对于浏览器最左边的距离-物体左边框相对于浏览器最左边的距离
      // console.log(e.clientX, e.clientY, "-----起始", el.offsetLeft);
      let X = e.clientX - el.offsetLeft;
      let Y = e.clientY - el.offsetTop;
      const move = (e: MouseEvent) => {
        // 获取拖拽元素的位置
        let left = e.clientX - X;
        let top = e.clientY - Y;
        positionX.value = left
        positionY.value = top
        if (left <= 0) {
          left = 0
        } else if (left >= document.documentElement.clientWidth - el.offsetWidth) {
          left = document.documentElement.clientWidth - el.offsetWidth
        }
        if (top <= 0) {
          top = 0
        } else if (top > document.documentElement.clientHeight - el.offsetHeight) {
          top = document.documentElement.clientHeight - el.offsetHeight
        }
        el.style.left = left + "px";
        el.style.top = top + "px";
      };
      document.addEventListener("mousemove", move);
      document.addEventListener("mouseup", () => {
        document.removeEventListener("mousemove", move);
      });
    };
    moveEl.addEventListener("mousedown", mouseDown);
  },
};
</script>
<style lang='less' scoped>
.box {
  position: fixed;
  left: 0;
  top: 0;
  width: 200px;
  height: 200px;
  border: 1px solid #ccc;
  background: red;
  .header {
    height: 20px;
    background: black;
    cursor: move;
  }
}
</style>

import { createApp } from 'vue'
// import './style.css'
import App from './App.vue'
import Drag from "./utils/drag.ts"
createApp(App).use(Drag).mount('#app')