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diff --git a/leave-school-vue/src/directive/el-dragDialog/drag.js b/leave-school-vue/src/directive/el-dragDialog/drag.js
new file mode 100644
index 0000000..68e0852
--- /dev/null
+++ b/leave-school-vue/src/directive/el-dragDialog/drag.js
@@ -0,0 +1,77 @@
+export default{
+ bind(el, binding, vnode) {
+ const dialogHeaderEl = el.querySelector('.el-dialog__header')
+ const dragDom = el.querySelector('.el-dialog')
+ dialogHeaderEl.style.cssText += ';cursor:move;'
+ dragDom.style.cssText += ';top:0px;'
+
+ // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
+ const getStyle = (function() {
+ if (window.document.currentStyle) {
+ return (dom, attr) => dom.currentStyle[attr]
+ } else {
+ return (dom, attr) => getComputedStyle(dom, false)[attr]
+ }
+ })()
+
+ dialogHeaderEl.onmousedown = (e) => {
+ // 鼠标按下，计算当前元素距离可视区的距离
+ const disX = e.clientX - dialogHeaderEl.offsetLeft
+ const disY = e.clientY - dialogHeaderEl.offsetTop
+
+ const dragDomWidth = dragDom.offsetWidth
+ const dragDomheight = dragDom.offsetHeight
+
+ const screenWidth = document.body.clientWidth
+ const screenHeight = document.body.clientHeight
+
+ const minDragDomLeft = dragDom.offsetLeft
+ const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth
+
+ const minDragDomTop = dragDom.offsetTop
+ const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight
+
+ // 获取到的值带px 正则匹配替换
+ let styL = getStyle(dragDom, 'left')
+ let styT = getStyle(dragDom, 'top')
+
+ if (styL.includes('%')) {
+ styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100)
+ styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100)
+ } else {
+ styL = +styL.replace(/\px/g, '')
+ styT = +styT.replace(/\px/g, '')
+ }
+
+ document.onmousemove = function(e) {
+ // 通过事件委托，计算移动的距离
+ let left = e.clientX - disX
+ let top = e.clientY - disY
+
+ // 边界处理
+ if (-(left) > minDragDomLeft) {
+ left = -minDragDomLeft
+ } else if (left > maxDragDomLeft) {
+ left = maxDragDomLeft
+ }
+
+ if (-(top) > minDragDomTop) {
+ top = -minDragDomTop
+ } else if (top > maxDragDomTop) {
+ top = maxDragDomTop
+ }
+
+ // 移动当前元素
+ dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`
+
+ // emit onDrag event
+ vnode.child.$emit('dragDialog')
+ }
+
+ document.onmouseup = function(e) {
+ document.onmousemove = null
+ document.onmouseup = null
+ }
+ }
+ }
+}