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  • el-dialog开启拖拽功能

    自定义指令v-drag
    /**
     * @description 自定义指令v-drag
     */
    Vue.directive('drag', {
      bind(el, binding, vNode) {
        if (
          el.querySelector('.el-dialog__header') &&
          el.querySelector('.el-dialog')
        ) {
          const dialogHeaderEl = el.querySelector('.el-dialog__header')
          const dragDom = el.querySelector('.el-dialog')
          dialogHeaderEl.style.cssText += ';cursor:move;'
          dragDom.style.cssText += ';top:0;'
    
          const getStyle = (function () {
            if (window.document.currentStyle) {
              return (dom, attr) => dom.currentStyle[attr]
            } else {
              return (dom, attr) => getComputedStyle(dom, null)[attr]
            }
          })()
    
          dialogHeaderEl.onmousedown = (e) => {
            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
    
            let styL = getStyle(dragDom, 'left')
            let styT = getStyle(dragDom, 'top')
    
            if (styL.includes('%')) {
              styL = +document.body.clientWidth * (+styL / 100)
              styT = +document.body.clientHeight * (+styT / 100)
            } else {
              styL = +styL.slice(0, -2)
              styT = +styT.slice(0, -2)
            }
    
            document.onmousemove = function (e) {
              let left = e.clientX - disX
              let top = e.clientY - disY
    
              if (-left > minDragDomLeft) {
                left = -minDragDomLeft
              } else if (left > maxDragDomLeft) {
                left = maxDragDomLeft
              }
    
              if (-top > minDragDomTop) {
                top = -minDragDomTop
              } else if (top > maxDragDomTop) {
                top = maxDragDomTop
              }
    
              dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`
    
              vNode.child.$emit('drag-dialog')
            }
    
            document.onmouseup = function () {
              document.onmousemove = null
              document.onmouseup = null
            }
          }
        }
      },
    })

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  • 原文地址:https://www.cnblogs.com/yeminglong/p/15059586.html
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