在网上找了很多，移到项目后总不满意，然后结合着自己改了一个
直接放注册指令代码，需要自己生成一个js文件放进去，并在main.js里面引入
```javascript
Vue.directive('dialogDrags', {
bind(el, binding, vnode, oldVnode) {
// 弹框可拉伸最小宽高
const minWidth = 400
const minHeight = 300
// 初始非全屏
let isFullScreen = false
// 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cursor
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)
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.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
}
}
dialogHeaderEl.onmousedown = moveDown
// 当前宽高
let nowWidth = 0
// let nowHight = 0
// 双击头部全屏效果
dialogHeaderEl.ondblclick = e => {
if (isFullScreen === false) {
// nowHight = dragDom.clientHeight
nowWidth = dragDom.clientWidth
nowMarginTop = dragDom.style.marginTop
dragDom.style.left = 0
dragDom.style.top = 0
dragDom.style.height = '100VH'
dragDom.style.width = '100VW'
dragDom.style.marginTop = 0
isFullScreen = true
dialogHeaderEl.style.cursor = 'initial'
dialogHeaderEl.onmousedown = null
} else {
dragDom.style.height = 'auto'
dragDom.style.width = nowWidth + 'px'
dragDom.style.marginTop = nowMarginTop
isFullScreen = false
dialogHeaderEl.style.cursor = 'move'
dialogHeaderEl.onmousedown = moveDown
}
}
var llqWidth = document.body.clientWidth
dragDom.onmousemove = function(e) {
// let moveE = e
if (
e.clientX > dragDom.offsetLeft + dragDom.clientWidth - 10 ||
dragDom.offsetLeft + 10 > e.clientX
) {
dragDom.style.cursor = 'w-resize'
} else if (
el.scrollTop + e.clientY >
dragDom.offsetTop + dragDom.clientHeight - 10
) {
dragDom.style.cursor = 's-resize'
} else {
dragDom.style.cursor = 'default'
dragDom.onmousedown = null
}
dragDom.onmousedown = e => {
const clientX = e.clientX
const clientY = e.clientY
const seeCK = window.innerWidth
const elW = dragDom.clientWidth
const elH = dragDom.clientHeight
const EloffsetLeft = dragDom.offsetLeft
const EloffsetTop = dragDom.offsetTop
dragDom.style.userSelect = 'none'
dragDom.style.posiiton = 'absolute'
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) {
// 移动时禁用默认事件
e.preventDefault()
// 左侧鼠标拖拽位置
if (clientX > EloffsetLeft && clientX < EloffsetLeft + 10) {
console.log('左边',clientX,e.clientX,elW)
dragDom.style.left='auto'
// 往左拖拽
if (clientX > e.clientX) {
dragDom.style.right=llqWidth-clientX-elW + 'px';
let sp = llqWidth-clientX-elW;
dragDom.style.width = elW + (clientX - e.clientX) + 'px'
// console.log('左边加',nowWidth,llqWidth,seeCK,sp,clientX)
}
// 往右拖拽
if (clientX < e.clientX) {
if (dragDom.clientWidth < minWidth) {
dragDom.style.width = minWidth
// console.log('youbian')
} else {
// console.log('右边')
dragDom.style.right=llqWidth-clientX-elW + 'px';
dragDom.style.width = elW - (e.clientX - clientX) + 'px'
}
}
}
// 右侧鼠标拖拽位置
if (
clientX > EloffsetLeft + elW - 10 &&
clientX < EloffsetLeft + elW
) {
dragDom.style.right='auto'
// 往左拖拽
if (clientX > e.clientX) {
if (dragDom.clientWidth < minWidth) {
// console.log('左')
} else {
dragDom.style.width = elW - (clientX - e.clientX) + 'px'
// console.log('左336666')
}
}
// 往右拖拽
if (clientX < e.clientX) {
dragDom.style.left=EloffsetLeft + 'px';
dragDom.style.width = elW + (e.clientX - clientX) + 'px'
// console.log('右',EloffsetLeft)
}
}
// 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) {
// console.log('上')
} else {
dragDom.style.height = elH - (clientY - e.clientY) + 'px'
// console.log(3333)
}
}
// 往下拖拽
if (clientY < e.clientY) {
// console.log('下')
dragDom.style.height = elH + (e.clientY - clientY) + 'px'
}
}
}
// 拉伸结束
document.onmouseup = function(e) {
document.onmousemove = null
document.onmouseup = null
}
}
}
}
}
})
使用的时候记得这里设置:close-on-click-modal=“false”，避免影响
<el-dialog v-dialogDrags :close-on-click-modal="false" title="转账" :visible.sync="isVisibles" align='left' @close="closeDialogs" class="transfer">
</el-dialog>