main文件
import '@/utils/dialog.js'
dialog.js代码
import Vue from 'vue'
import variables from '@/styles/variables.scss'/** 使用方法* 将以下代码复制到一个js文件中，然后在入口文件main.js中import引入即可；* 给elementUI的dialog上加上 v-dialogDrag 指令就可以实现弹窗的全屏和拉伸了。* 给dialog设置 :close-on-click-modal="false" , 禁止点击遮罩层关闭弹出层* 如果是form表单，不要将提交等按钮放置el-form-item，以免在上下拉伸时被隐藏*/// v-dialogDrag: 弹窗拖拽+水平方向伸缩Vue.directive('dialogDrag', {bind(el, binding, vnode, oldVnode) {// 弹框可拉伸最小宽高const minWidth = 400const minHeight = 300// 初始非全屏let isFullScreen = false// 当前宽高let nowWidth = 0let nowHight = 0// 当前顶部高度let nowMarginTop = 0// 获取弹框头部（这部分可双击全屏）const dialogHeaderEl = el.querySelector('.el-dialog__header')// 弹窗const dragDom = el.querySelector('.el-dialog')// 给弹窗加上overflow auto；不然缩小时框内的标签可能超出dialog；dragDom.style.overflow = 'auto'// 清除选择头部文字效果// dialogHeaderEl.onselectstart = new Function("return false");// 头部加上可拖动cursordialogHeaderEl.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)const moveDown = (e) => {// 鼠标按下，计算当前元素距离可视区的距离const disX = e.clientX - dialogHeaderEl.offsetLeftconst 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pxif (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 - disXconst 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 = nulldocument.onmouseup = null}}dialogHeaderEl.onmousedown = moveDown// const zuidahua = el.querySelector('#zuidahua')const zuidahua = el.querySelector('.zuidahuaClass')// 双击头部全屏效果if (zuidahua != null) {zuidahua.onclick = (e) => {if (isFullScreen == false) {nowHight = dragDom.clientHeightnowWidth = dragDom.clientWidthnowMarginTop = dragDom.style.marginTopdragDom.style.left = 0dragDom.style.top = 0dragDom.style.bottom = 0dragDom.style.height = window.innerHeight + 'px'dragDom.style.width = '100VW'dragDom.style.marginTop = '0px'isFullScreen = truedialogHeaderEl.style.cursor = 'initial'dialogHeaderEl.onmousedown = null} else {dragDom.style.height = 'auto'dragDom.style.width = nowWidth + 'px'dragDom.style.marginTop = nowMarginTopisFullScreen = falsedialogHeaderEl.style.cursor = 'move'dialogHeaderEl.onmousedown = moveDown}}}dragDom.onmousemove = function(e) {const moveE = eif (!(el.scrollTop + e.clientY > dragDom.offsetTop + dragDom.clientHeight - 10) && (e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10)) {dragDom.style.cursor = 'w-resize'} else if ((el.scrollTop + e.clientY > dragDom.offsetTop + dragDom.clientHeight - 10) && !(e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10)) {dragDom.style.cursor = 's-resize'} else if ((el.scrollTop + e.clientY > dragDom.offsetTop + dragDom.clientHeight - 10) && (e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10)) {dragDom.style.cursor = 'se-resize'} else {dragDom.style.cursor = 'default'dragDom.onmousedown = null}dragDom.onmousedown = (e) => {const clientX = e.clientXconst clientY = e.clientYconst elW = dragDom.clientWidthconst elH = dragDom.clientHeightconst EloffsetLeft = dragDom.offsetLeftconst EloffsetTop = dragDom.offsetTopdragDom.style.userSelect = 'none'const ELscrollTop = el.scrollTop// 判断点击的位置是不是为头部if (clientX > EloffsetLeft && clientX < EloffsetLeft + elW && clientY > EloffsetTop && clientY < EloffsetTop + 100) {// 如果是头部在此就不做任何动作，以上有绑定dialogHeaderEl.onmousedown = moveDown;} else {document.onmousemove = function(e) {e.preventDefault() // 移动时禁用默认事件// 左侧鼠标拖拽位置// if (clientX > EloffsetLeft && clientX < EloffsetLeft + 10) {// // 往左拖拽// if (clientX > e.clientX) {// dragDom.style.width = elW + (clientX - e.clientX) * 2 + 'px'// }// // 往右拖拽// if (clientX < e.clientX) {// if (dragDom.clientWidth < minWidth) {// } else {// dragDom.style.width = elW - (e.clientX - clientX) * 2 + 'px'// }// }// }// 右侧鼠标拖拽位置if (clientX > EloffsetLeft + elW - 10 && clientX < EloffsetLeft + elW) {// 往左拖拽if (clientX > e.clientX) {if (dragDom.clientWidth < minWidth) {} else {dragDom.style.width = elW - (clientX - e.clientX) * 2 + 'px'}}// 往右拖拽if (clientX < e.clientX) {dragDom.style.width = elW + (e.clientX - clientX) * 2 + 'px'}}// 底部鼠标拖拽位置if (ELscrollTop + clientY > EloffsetTop + elH - 20 && ELscrollTop + clientY < EloffsetTop + elH) {// 往上拖拽if (clientY > e.clientY) {if (dragDom.clientHeight < minHeight) {} else {dragDom.style.height = elH - (clientY - e.clientY) + 'px'}}// 往下拖拽if (clientY < e.clientY) {dragDom.style.height = elH + (e.clientY - clientY) + 'px'}}}// 拉伸结束document.onmouseup = function(e) {document.onmousemove = nulldocument.onmouseup = null}}}}}})