Vue.directive('dialogDrag', {

    bind(el, binding, vnode, oldVnode) {

      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)

      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

        // 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, '')

        }

        document.onmousemove = function(e) {

          // 通过事件委托，计算移动的距离

          const l = e.clientX - disX

          const t = e.clientY - disY

          // 移动当前元素

          dragDom.style.left = `${l + styL}px`

          dragDom.style.top = `${t + styT}px`

          // 将此时的位置传出去

          // binding.value({x:e.pageX,y:e.pageY})

        }

        document.onmouseup = function(e) {

          document.onmousemove = null

          document.onmouseup = null

        }

      }

    }

  })