document.onmouseup = function (event) { document.onmousemove = null; if (event.pageX < 10) { document.getElementById('floatingButton').style.left = 10 + 'px'; document.onmouseup = null; } else if (event.pageX > w) { document.getElementById('floatingButton').style.left = w - 40 + 'px'; } if (event.pageY < 50) { document.getElementById('floatingButton').style.top = 50 + 'px'; document.onmouseup = null; } else if (event.pageY > h) { document.getElementById('floatingButton').style.top = h - 100 + 'px'; } };这段代码干嘛的

这段代码实现了浮动按钮的拖拽结束后的处理，包括停止拖拽、调整按钮位置以及重置鼠标事件监听器等。

具体来说，这段代码执行了以下操作：

1. 给整个文档对象添加了一个 `mouseup` 事件监听器。

2. 当鼠标松开时，将文档对象上的 `mousemove` 事件监听器设置为 `null`，表示停止拖拽操作。

3. 判断按钮是否超出文档边界，如果超出了左边界，则将按钮的左边距设置为 `10`，如果超出了右边界，则将按钮的左边距设置为 `w - 40`；如果超出了上边界，则将按钮的上边距设置为 `50`，如果超出了下边界，则将按钮的上边距设置为 `h - 100`。

4. 根据按钮的新位置，调整 `document.onmouseup` 的事件监听器，如果按钮超出了左边界或上边界，则将 `document.onmouseup` 的事件监听器设置为 `null`，表示停止拖拽操作。

总之，这段代码实现了一个简单的浮动按钮的拖拽结束后的处理，包括停止拖拽、调整按钮位置以及重置鼠标事件监听器等。

相关问题

请根据代码片段仿写实现div左下角拖拽移动用具体代码实现，import Vue from 'vue' Vue.directive('dialogZoomOut', { bind(el, binding, vnode, oldVnode) { let minWidth = 400;let minHeight = 300;let isFullScreen = false; let nowWidth = 0;let nowHight = 0;let nowMarginTop = 0;const dialogHeaderEl = el.querySelector('.el-dialog__header');const dragDom = el.querySelector('.el-dialog');dragDom.style.overflow = "auto";dialogHeaderEl.onselectstart = new Function("return false");dialogHeaderEl.style.cursor = 'move';const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);let moveDown = (e) => {const disX = e.clientX - dialogHeaderEl.offsetLeft;const disY = e.clientY - dialogHeaderEl.offsetTop;let styL, styT;if (sty.left.includes('%')) {styL = +document.body.clientWidth * (+sty.left.replace(/%/g, '') / 100);styT = +document.body.clientHeight * (+sty.top.replace(/%/g, '') / 100);} else {styL = +sty.left.replace(/px/g, '');styT = +sty.top.replace(/px/g, '');};document.onmousemove = function (e) {const l = e.clientX - disX;const t = e.clientY - disY;dragDom.style.left = `${l + styL}px`;dragDom.style.top = `${t + styT}px`;};document.onmouseup = function (e) {document.onmousemove = null;document.onmouseup = null;};}dialogHeaderEl.onmousedown = moveDown;dialogHeaderEl.ondblclick = (e) => {if (isFullScreen == false) {nowHight = dragDom.clientHeight;nowWidth = dragDom.clientWidth;nowMarginTop = dragDom.style.marginTop;dragDom.style.left = 0;dragDom.style.top = 0;dragDom.style.height = "100VH";dragDom.style.width = "100VW";dragDom.style.marginTop = 0;isFullScreen = true;dialogHeaderEl.style.cursor = 'initial';dialogHeaderEl.onmousedown = null;} else {dragDom.style.height = "auto";dragDom.style.width = nowWidth + 'px';dragDom.style.marginTop = nowMarginTop;isFullScreen = false;dialogHeaderEl.style.cursor = 'move';dialogHeaderEl.onmousedown = moveDown;}}let resizeEl = document.createElement("div");dragDom.appendChild(resizeEl);resizeEl.style.cursor = 'se-resize';resizeEl.style.position = 'absolute';resizeEl.style.height = '10px';resizeEl.style.width = '10px';resizeEl.style.right = '0px';resizeEl.style.bottom = '0px';resizeEl.style.zIndex = '99';resizeEl.onmousedown = (e) => {let clientX = e.clientX;let disX = e.clientX - resizeEl.offsetLeft;let disY = e.clientY - resizeEl.offsetTop;document.onmousemove = function (e) {e.preventDefault(); let x = e.clientX - disX + (e.clientX - clientX);let y = e.clientY - disY;dragDom.style.width = x > minWidth ? `${x}px` : minWidth + 'px';dragDom.style.height = y > minHeight ? `${y}px` : minHeight + 'px';};document.onmouseup = function (e) {document.onmousemove = null;document.onmouseup = null;};}}})

以下是仿写的代码实现：

<template>
  <div class="dialog-wrapper" v-dialog-zoom-out>
    <div class="el-dialog">
      <div class="el-dialog__header">Dialog Title</div>
      <div class="el-dialog__body">Dialog Content</div>
      <div class="el-dialog__footer">
        <button @click="$emit('close')">Close</button>
      </div>
      <div class="el-dialog__resize"></div>
    </div>
  </div>
</template>

<script>
export default {
  name: "Dialog",
};
</script>

<style>
.dialog-wrapper {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.el-dialog {
  position: absolute;
  top: 0;
  left: 0;
  overflow: auto;
  max-height: 80vh;
  background-color: #fff;
  border-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.el-dialog__header {
  padding: 16px;
  background-color: #f5f7fa;
  border-top-left-radius: 4px;
  border-top-right-radius: 4px;
  cursor: move;
}

.el-dialog__body {
  padding: 16px;
}

.el-dialog__footer {
  display: flex;
  justify-content: flex-end;
  padding: 16px;
  background-color: #f5f7fa;
  border-bottom-left-radius: 4px;
  border-bottom-right-radius: 4px;
}

.el-dialog__footer button {
  padding: 8px 16px;
  background-color: #fff;
  border: 1px solid #c1c1c1;
  border-radius: 4px;
  cursor: pointer;
}

.el-dialog__resize {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 10px;
  height: 10px;
  cursor: se-resize;
  background-color: #c1c1c1;
}
</style>

import Vue from "vue";

Vue.directive("dialogZoomOut", {
  bind(el, binding, vnode, oldVnode) {
    let minWidth = 400;
    let minHeight = 300;
    let isFullScreen = false;
    let nowWidth = 0;
    let nowHight = 0;
    let nowMarginTop = 0;
    const dialogHeaderEl = el.querySelector(".el-dialog__header");
    const dragDom = el.querySelector(".el-dialog");
    dragDom.style.overflow = "auto";
    dialogHeaderEl.onselectstart = new Function("return false");
    dialogHeaderEl.style.cursor = "move";
    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null);
    let moveDown = (e) => {
      const disX = e.clientX - dialogHeaderEl.offsetLeft;
      const disY = e.clientY - dialogHeaderEl.offsetTop;
      let styL, styT;
      if (sty.left.includes("%")) {
        styL = +document.body.clientWidth * (+sty.left.replace(/%/g, "") / 100);
        styT = +document.body.clientHeight * (+sty.top.replace(/%/g, "") / 100);
      } else {
        styL = +sty.left.replace(/px/g, "");
        styT = +sty.top.replace(/px/g, "");
      }
      document.onmousemove = function (e) {
        const l = e.clientX - disX;
        const t = e.clientY - disY;
        dragDom.style.left = `${l + styL}px`;
        dragDom.style.top = `${t + styT}px`;
      };
      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
    dialogHeaderEl.onmousedown = moveDown;
    dialogHeaderEl.ondblclick = (e) => {
      if (isFullScreen == false) {
        nowHight = dragDom.clientHeight;
        nowWidth = dragDom.clientWidth;
        nowMarginTop = dragDom.style.marginTop;
        dragDom.style.left = 0;
        dragDom.style.top = 0;
        dragDom.style.height = "100VH";
        dragDom.style.width = "100VW";
        dragDom.style.marginTop = 0;
        isFullScreen = true;
        dialogHeaderEl.style.cursor = "initial";
        dialogHeaderEl.onmousedown = null;
      } else {
        dragDom.style.height = "auto";
        dragDom.style.width = nowWidth + "px";
        dragDom.style.marginTop = nowMarginTop;
        isFullScreen = false;
        dialogHeaderEl.style.cursor = "move";
        dialogHeaderEl.onmousedown = moveDown;
      }
    };
    let resizeEl = document.createElement("div");
    dragDom.appendChild(resizeEl);
    resizeEl.style.cursor = "se-resize";
    resizeEl.style.position = "absolute";
    resizeEl.style.height = "10px";
    resizeEl.style.width = "10px";
    resizeEl.style.right = "0px";
    resizeEl.style.bottom = "0px";
    resizeEl.style.zIndex = "99";
    resizeEl.onmousedown = (e) => {
      let clientX = e.clientX;
      let disX = e.clientX - resizeEl.offsetLeft;
      let disY = e.clientY - resizeEl.offsetTop;
      document.onmousemove = function (e) {
        e.preventDefault();
        let x = e.clientX - disX + (e.clientX - clientX);
        let y = e.clientY - disY;
        dragDom.style.width = x > minWidth ? `${x}px` : minWidth + "px";
        dragDom.style.height = y > minHeight ? `${y}px` : minHeight + "px";
      };
      document.onmouseup = function (e) {
        document.onmousemove = null;
        document.onmouseup = null;
      };
    };
  },
});

上述代码实现了一个类似于Element UI中的Dialog组件的拖拽和缩放功能。在使用时，只需要将 `v-dialog-zoom-out` 指令绑定到Dialog组件的容器元素上，即可实现拖拽和缩放功能。

var box = document.querySelector('.box') var box1 = document.querySelector('.box1') box.onmousedown = function (e) { var e = e || window.event var e = event.offsetX var d = event.offsetY console.log(e) console.log(d) } box1.onmousemove = function (e) { var e = e || window.event var x =event.offsetX var y =event.offsetY console.log(x) console.log(y) box.style.left = x + 'px' box.style.top = y + 'px' } box1.onmouseup = function () { console.log('我要取消了移动事件') box1.onmousemove = null } 这段代码的错误

这段代码的错误在于以下几点：

1. 在 box.onmousedown 事件处理函数中，将 event 对象的 offsetX 属性赋值给了变量 e，导致后面的代码中 e 的值被覆盖，无法得到正确的鼠标点击位置。

2. 在 box1.onmousemove 事件处理函数中，获取鼠标移动位置时，将 event 对象的 offsetX 和 offsetY 属性分别赋值给了变量 x 和 y，但是变量 x 和 y 在后面的代码中没有被使用，导致无法实现 box 的移动。

3. 在 box1.onmouseup 事件处理函数中，尝试取消 box1.onmousemove 事件处理函数，但是这样是无法生效的，因为 box1.onmousemove 赋值为 null 并不会取消事件处理函数。

正确的代码应该是：

var box = document.querySelector('.box');
var box1 = document.querySelector('.box1');
var offsetX, offsetY;

box.onmousedown = function (e) {
  var e = e || window.event;
  offsetX = e.offsetX;
  offsetY = e.offsetY;
  console.log(offsetX);
  console.log(offsetY);
}

box1.onmousemove = function (e) {
  var e = e || window.event;
  var x = e.clientX - offsetX;
  var y = e.clientY - offsetY;
  console.log(x);
  console.log(y);
  box.style.left = x + 'px';
  box.style.top = y + 'px';
}

box1.onmouseup = function () {
  console.log('我要取消了移动事件');
  box1.onmousemove = null;
}

在上述代码中，我们将鼠标点击位置的 offsetX 和 offsetY 值保存在变量中，在 box1.onmousemove 事件处理函数中，根据鼠标移动的位置计算出 box 的新位置，并将其赋值给 box 的 style.left 和 style.top 属性，实现了盒子的移动。在 box1.onmouseup 事件处理函数中，我们将 box1.onmousemove 赋值为 null，实现了取消 box1.onmousemove 事件处理函数的效果。