原生js实现拖拽效果

在这里插入图片描述

<!DOCTYPE html>  
<html>  
<head>  
    <style>  
        #mydiv {  
            width: 200px;  
            height: 200px;  
            background-color: red;  
            position: absolute;  
            cursor: move;  
        }  
    </style>  |
</head>  
<body>  
    <div id="mydiv">拖拽我</div>  
    <script>  
        var mydiv = document.getElementById('mydiv');  
        var x = 0, y = 0;  
        var limitX = window.innerWidth - 200; // 设置元素的最大宽度为屏幕宽度减去元素的宽度  
        var limitY = window.innerHeight - 200; // 设置元素的最大高度为屏幕高度减去元素的高度  
  
        mydiv.onmousedown = function(e) {  
            x = e.clientX - mydiv.getBoundingClientRect().left;  
            y = e.clientY - mydiv.getBoundingClientRect().top;  
            document.onmousemove = function(e) {  
                var newX = e.clientX - x;  
                var newY = e.clientY - y;  
                if (newX < 0) newX = 0; // 防止元素向左拖出屏幕外  
                if (newY < 0) newY = 0; // 防止元素向上拖出屏幕外  
                if (newX > limitX) newX = limitX; // 防止元素向右拖出屏幕外  
                if (newY > limitY) newY = limitY; // 防止元素向下拖出屏幕外  
                mydiv.style.left = newX + 'px';  
                mydiv.style.top = newY + 'px';  
            };  
            document.onmouseup = function() {  
                document.onmousemove = null; // 当鼠标松开时，移除鼠标移动事件  
            };  
        };  
    </script>  
</body>  
</html>

<template>
  <div class="drag-box">
    <div id="dragContent">
      <div class="drag-home">
        <div class="drag-title" v-show="titleVisible">
          软<br>键<br>盘
        </div>
        <div class="drag-switch">
          <div class="message">
            <div class="name">液压支架</div>
            <div class="info">当前操作:前立柱升</div>
            <div class="info">当前操作:前立柱升</div>
          </div>
          <div class="drag-button">
            <div class="menu">
              <el-button type="primary" round>采煤机</el-button>
              <el-button type="success" round>液压知己</el-button>
              <el-button type="info" round>总控开关</el-button>
            </div>
            <div class="stats">
              <el-button type="success" round v-for="(item, index) in 9" :key="index" style="width: 8rem;">按钮{{ item }}</el-button>
              <i v-for="item in 9" :key="item"></i>
            </div>
            <div class="submit">
              <el-button type="primary" round>启动</el-button>
              <el-button type="success" round>停止</el-button>
            </div>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { reactive, toRefs, onBeforeMount, onMounted, getCurrentInstance } from 'vue'

export default {
  components: {},
  setup() {
    const state = reactive({
      rightDistance: '',
      leftWidth: '',
      maxWidth: '',
      titleVisible: false
    })

    onBeforeMount(() => {

    })

    onMounted(() => {
      var dragContent = document.getElementById('dragContent');
      var x = 0, y = 0;
      var limitX = window.innerWidth - 400; // 设置元素的最大宽度为屏幕宽度减去元素的宽度  
      state.maxWidth = limitX
      var limitY = window.innerHeight - 600; // 设置元素的最大高度为屏幕高度减去元素的高度  

      var box = document.getElementById("dragContent")
      box.addEventListener('mouseover', () => {
        if (state.drightDistance == 0) {
          box.style.left = `${state.maxWidth / 10}rem`
          box.style.transitionDuration =  '1s'
          setTimeout(() => {
            state.titleVisible = false
          }, 300)
        } else {
          box.style.transitionDuration =  '0s'
        }
      })
      
      box.addEventListener('mouseout', () => {
        if (state.drightDistance == 0) {
          box.style.left = `${state.maxWidth / 10 + 40}rem`
          box.style.transitionDuration =  '1s'
          setTimeout(() => {
            state.titleVisible = true
          }, 300)
        } else {
          box.style.transitionDuration =  '0s'
        }
      });

      dragContent.onmousedown = (e) => {
        x = e.clientX - dragContent.getBoundingClientRect().left;
        y = e.clientY - dragContent.getBoundingClientRect().top;
        document.onmousemove = function (e) {
          var newX = e.clientX - x;
          var newY = e.clientY - y;
          if (newX < 0) newX = 0; // 防止元素向左拖出屏幕外  
          if (newY < 0) newY = 0; // 防止元素向上拖出屏幕外  
          if (newX > limitX) newX = limitX; // 防止元素向右拖出屏幕外  
          if (newY > limitY) newY = limitY; // 防止元素向下拖出屏幕外  
          dragContent.style.left = newX + 'px';
          dragContent.style.top = newY + 'px';
          state.leftWidth = newX
          state.drightDistance = limitX - newX
          // console.log(state.leftWidth)
        };
        document.onmouseup = () => {
          document.onmousemove = null; // 当鼠标松开时，移除鼠标移动事件  
          console.log('当前坐标点', state.drightDistance)

          if (state.drightDistance == 0) {
            
          }
        }
      }
    })

    return {
      ...toRefs(state),
    }
  }
}
</script>
<style lang="scss" scoped>
.drag-box {
  width: 100%;
  height: 100vh;
  overflow: hidden;
  position: absolute;
}

#dragContent {
  width: 400px;
  height: 600px;
  position: absolute;
  right: 8rem;
  top: 50%;
  cursor: move;
  .drag-home {
    height: 100%;
    position: relative;
    background-color: #091659;
    border-radius: 3rem;
    .drag-title {
      position: absolute;
      left: -4rem;
      top: calc(50% - 8rem);
      font-size: 2rem;
      width: 4rem;
      height: 16rem;
      background: #0b133d;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 1rem 0 0 1rem
    }
    .drag-switch {
      height: 100%;
      position: relative;
      .message {
        text-align: left;
        padding: 2rem;
        .name {
          font-size: 2.5rem;
          margin: 0.5rem 0;
        }
        .info {
          font-size: 1.4rem;
          margin: 0.3rem 0;
        }
      }
      .drag-button {
        height: 80%;
        background: #22387b;
        position: absolute;
        bottom: 0;
        width: 90%;
        left: 5%;
        border-radius: 2rem;
        .menu {
          margin: 1rem 0;
          height: 10%;
        }
        .stats {
          height: 75%;
          /*background: pink;*/
          justify-content: space-around;
          align-content: start;
          display: flex;
          flex-wrap: wrap;
          .el-button {
            margin: 1rem 0;
          }
          .el-button+.el-button {
            margin-left: unset;
          }
          i {
            margin: 1rem 0;
            width: 8rem;
          }
        }
        .submit {
          height: 15%;
        }
      }
    }
  }
}
</style>