addform/src/main.js

## 安装 ``` npm i element-ui npm i addform ```

import Vue from 'vue'
import App from './App.vue'
import router from './router'
import store from './store'
import addform from "./index"
//import addform from "addform"
import ElementUI from 'element-ui';
import 'element-ui/lib/theme-chalk/index.css';
Vue.config.productionTip = false
    // v-dialogDrag: 弹窗拖拽
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 {

                //ie11里面的el-dialog的left和top是auto但是getComputedStyle中的属性不能设置，所以就在正则中把auto也处理掉

                styL = +sty.left.replace(/\px|auto/g, "");
                styT = +sty.top.replace(/\px|auto/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;
            };
        };
    }
});
Vue.use(ElementUI).use(addform)
new Vue({
    router,
    store,
    render: h => h(App)
}).$mount('#app')