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src/directive/dialog/drag.js

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+/**
+* v-dialogDrag 弹窗拖拽
+* Copyright (c) 2019 ruoyi
+*/
+
+export default {
+  bind(el, binding, vnode, oldVnode) {
+    const value = binding.value
+    if (value == false) return
+    // 获取拖拽内容头部
+    const dialogHeaderEl = el.querySelector('.el-dialog__header')
+    const dragDom = el.querySelector('.el-dialog')
+    dialogHeaderEl.style.cursor = 'move'
+    // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null)
+    const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
+    dragDom.style.position = 'absolute'
+    dragDom.style.marginTop = 0
+    let width = dragDom.style.width
+    if (width.includes('%')) {
+      width = +document.body.clientWidth * (+width.replace(/\%/g, '') / 100)
+    } else {
+      width = +width.replace(/\px/g, '')
+    }
+    dragDom.style.left = `${(document.body.clientWidth - width) / 2}px`
+    // 鼠标按下事件
+    dialogHeaderEl.onmousedown = (e) => {
+      // 鼠标按下，计算当前元素距离可视区的距离 (鼠标点击位置距离可视窗口的距离)
+      const disX = e.clientX - dialogHeaderEl.offsetLeft
+      const disY = e.clientY - dialogHeaderEl.offsetTop
+
+      // 获取到的值带px 正则匹配替换
+      let styL, styT
+
+      // 注意在ie中 第一次获取到的值为组件自带50% 移动之后赋值为px
+      if (sty.left.includes('%')) {
+        styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, '') / 100)
+        styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, '') / 100)
+      } else {
+        styL = +sty.left.replace(/\px/g, '')
+        styT = +sty.top.replace(/\px/g, '')
+      }
+
+      // 鼠标拖拽事件
+      document.onmousemove = function (e) {
+        // 通过事件委托，计算移动的距离 （开始拖拽至结束拖拽的距离）
+        const l = e.clientX - disX
+        const t = e.clientY - disY
+
+        let finallyL = l + styL
+        let finallyT = t + styT
+
+        // 移动当前元素
+        dragDom.style.left = `${finallyL}px`
+        dragDom.style.top = `${finallyT}px`
+
+      }
+
+      document.onmouseup = function (e) {
+        document.onmousemove = null
+        document.onmouseup = null
+      }
+    }
+  }
+}

src/directive/dialog/dragHeight.js

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+/**
+ * v-dialogDragWidth 可拖动弹窗高度（右下角）
+ * Copyright (c) 2019 ruoyi
+ */
+
+export default {
+  bind(el) {
+    const dragDom = el.querySelector('.el-dialog')
+    const lineEl = document.createElement('div')
+    lineEl.style = 'width: 6px; background: inherit; height: 10px; position: absolute; right: 0; bottom: 0; margin: auto; z-index: 1; cursor: nwse-resize;'
+    lineEl.addEventListener('mousedown',
+      function(e) {
+        // 鼠标按下，计算当前元素距离可视区的距离
+        const disX = e.clientX - el.offsetLeft
+        const disY = e.clientY - el.offsetTop
+        // 当前宽度 高度
+        const curWidth = dragDom.offsetWidth
+        const curHeight = dragDom.offsetHeight
+        document.onmousemove = function(e) {
+          e.preventDefault() // 移动时禁用默认事件
+          // 通过事件委托，计算移动的距离
+          const xl = e.clientX - disX
+          const yl = e.clientY - disY
+          dragDom.style.width = `${curWidth + xl}px`
+          dragDom.style.height = `${curHeight + yl}px`
+        }
+        document.onmouseup = function(e) {
+          document.onmousemove = null
+          document.onmouseup = null
+        }
+      }, false)
+    dragDom.appendChild(lineEl)
+  }
+}

src/directive/dialog/dragWidth.js

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+/**
+ * v-dialogDragWidth 可拖动弹窗宽度（右侧边）
+ * Copyright (c) 2019 ruoyi
+ */
+
+export default {
+  bind(el) {
+    const dragDom = el.querySelector('.el-dialog')
+    const lineEl = document.createElement('div')
+    lineEl.style = 'width: 5px; background: inherit; height: 80%; position: absolute; right: 0; top: 0; bottom: 0; margin: auto; z-index: 1; cursor: w-resize;'
+    lineEl.addEventListener('mousedown',
+      function (e) {
+        // 鼠标按下，计算当前元素距离可视区的距离
+        const disX = e.clientX - el.offsetLeft
+        // 当前宽度
+        const curWidth = dragDom.offsetWidth
+        document.onmousemove = function (e) {
+          e.preventDefault() // 移动时禁用默认事件
+          // 通过事件委托，计算移动的距离
+          const l = e.clientX - disX
+          dragDom.style.width = `${curWidth + l}px`
+        }
+        document.onmouseup = function (e) {
+          document.onmousemove = null
+          document.onmouseup = null
+        }
+      }, false)
+    dragDom.appendChild(lineEl)
+  }
+}