1 
 2 Vue.directive(‘dialogDrag‘, {
 3     bind(el, binding, vnode, oldVnode) {
 4       const dialogHeaderEl = el.querySelector(‘.el-dialog__header‘)
 5       const dragDom = el.querySelector(‘.el-dialog‘)
 6       dialogHeaderEl.style.cursor = ‘move‘
 7   
 8       // 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
 9       const sty = dragDom.currentStyle || window.getComputedStyle(dragDom, null)
10   
11       dialogHeaderEl.onmousedown = (e) => {
12         // 鼠标按下，计算当前元素距离可视区的距离
13         const disX = e.clientX - dialogHeaderEl.offsetLeft
14         const disY = e.clientY - dialogHeaderEl.offsetTop
15   
16         // 获取到的值带px 正则匹配替换
17         let styL, styT
18   
19         // 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
20         if (sty.left.includes(‘%‘)) {
21           styL = +document.body.clientWidth * (+sty.left.replace(/\%/g, ‘‘) / 100)
22           styT = +document.body.clientHeight * (+sty.top.replace(/\%/g, ‘‘) / 100)
23         } else {
24           styL = +sty.left.replace(/\px/g, ‘‘)
25           styT = +sty.top.replace(/\px/g, ‘‘)
26         }
27   
28         document.onmousemove = function(e) {
29           // 通过事件委托，计算移动的距离
30           const l = e.clientX - disX
31           const t = e.clientY - disY
32   
33           // 移动当前元素
34           dragDom.style.left = `${l + styL}px`
35           dragDom.style.top = `${t + styT}px`
36   
37           // 将此时的位置传出去
38           // binding.value({x:e.pageX,y:e.pageY})
39         }
40   
41         document.onmouseup = function(e) {
42           document.onmousemove = null
43           document.onmouseup = null
44         }
45       }
46     }
47   })
48