本文主要介绍了vue实现可拖拽的dialog弹框，分享给大家，具体如下：
element的dialog弹框在项目中挺常用的。但有时候嵌套的话会遮住，体验不好。拖拽形式的弹框会提高用户体验
借助基于 Sortable.js 的 Vue 拖拽组件vuedraggable
安装
npm install vuedraggable --save
在公共组件中新建个js文件，搭配vue自定义指令来实现拖拽的效果
import Vue from 'vue';
// v-dialogDrag: 弹窗拖拽属性
Vue.directive('dialogDrag', {
bind(el, binding, vnode, oldVnode) {
const dialogHeaderEl = el.querySelector('.el-dialog__header');
const dragDom = el.querySelector('.el-dialog');
dialogHeaderEl.style.cssText += ';cursor:move;'
dragDom.style.cssText += ';top:0px;'
// 获取原有属性 ie dom元素.currentStyle 火狐谷歌 window.getComputedStyle(dom元素, null);
const sty = (() => {
if (window.document.currentStyle) {
return (dom, attr) => dom.currentStyle[attr];
} else {
return (dom, attr) => getComputedStyle(dom, false)[attr];
}
})()
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;
const screenWidth = document.body.clientWidth; // body当前宽度
const screenHeight = document.documentElement.clientHeight; // 可见区域高度(应为body高度，可某些环境下无法获取)
const dragDomWidth = dragDom.offsetWidth; // 对话框宽度
const dragDomheight = dragDom.offsetHeight; // 对话框高度
const minDragDomLeft = dragDom.offsetLeft;
const maxDragDomLeft = screenWidth - dragDom.offsetLeft - dragDomWidth;
const minDragDomTop = dragDom.offsetTop;
const maxDragDomTop = screenHeight - dragDom.offsetTop - dragDomheight;
// 获取到的值带px 正则匹配替换
let styL = sty(dragDom, 'left');
let styT = sty(dragDom, 'top');
// 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 (styL.includes('%')) {
styL = +document.body.clientWidth * (+styL.replace(/\%/g, '') / 100);
styT = +document.body.clientHeight * (+styT.replace(/\%/g, '') / 100);
} else {
styL = +styL.replace(/\px/g, '');
styT = +styT.replace(/\px/g, '');
};
document.onmousemove = function (e) {
// 通过事件委托，计算移动的距离
let left = e.clientX - disX;
let top = e.clientY - disY;
// 边界处理
if (-(left) > minDragDomLeft) {
left = -(minDragDomLeft);
} else if (left > maxDragDomLeft) {
left = maxDragDomLeft;
}
if (-(top) > minDragDomTop) {
top = -(minDragDomTop);
} else if (top > maxDragDomTop) {
top = maxDragDomTop;
}
// 移动当前元素
dragDom.style.cssText += `;left:${left + styL}px;top:${top + styT}px;`;
};
document.onmouseup = function (e) {
document.onmousemove = null;
document.onmouseup = null;
};
}
}
})
页面中使用 v-dialogDrag 即可实现想要的效果
<el-dialog
v-dialogDrag
:title="dialogTitle"
:visible.sync="addDialogVisible"
:before-close="handleClose"
:close-on-click-modal="false"
width="50%">
<div class="add_columns">
<div class="pull-organize">
<div class="bm-title">部门管理</div>
<el-tree
:data="treeData"
lazy:load="loadNode"
accordion
:props="defaultProps"
:default-expand-all="false">
</el-tree>
</div>
<div class="show-information">
<el-form inline>
<el-form-item label="用户ID">
<el-input v-model="searchParams.userId" size="mini" ></el-input>
</el-form-item>
<el-form-item label="用户名">
<el-input v-model="searchParams.userName" size="mini"></el-input>
</el-form-item>
<el-form-item class="btn-item">
<el-button type="primary" @click="handleQuery" size="mini">查询</el-button>
</el-form-item>
<el-form-item class="btn-item">
<el-button type="success" @click="hadnleAddPerson" size="mini">添加人员</el-button>
</el-form-item>
</el-form>
<el-table
:data="tableData"
class="oneTabel"
style="width:100%;">
<el-table-column type="selection" width="50"></el-table-column>
<el-table-column prop="id" width="60" label="登录ID"></el-table-column>
<el-table-column prop="userName" label="用户名"></el-table-column>
<el-table-column prop="education" label="部门"></el-table-column>
<el-table-column prop="sex" label="手机"></el-table-column>
</el-table>
</div>
</div>
</el-dialog>
