Vue $mount实战之实现消息弹窗组件

   <div class="p-message"> <div class="p-message-container"> <i class="p-message-icon"></i><div class="p-message-content">  <div></div></div></div></div> @import "p-message.styl" 

 import Vue from 'vue'; import PMessage from './PMessage.vue'; import {popupManager} from "../../common/js/popup-manager"; let PMessageControl = Vue.extend(PMessage); let count = 0; // 存储message组件实例，如需有关闭所有message的功能就需要将每个message组件都存储起来 let instances = []; const isVNode = function (node) { return node !== null && typeof node === 'object' && Object.prototype.hasOwnProperty.call(node, 'componentOptions'); }; const Message = function (options) { options = options || {}; if(typeof options === 'string'){ options = { message: options }; } let id = 'message_' + ++count; let userOnClose = options.onClose; // PMsesage.vue销毁时会调用传递进去的onClose，而onClose的处理就是将指定id的message组件从instances中移除 options.onClose = function (){ Message._close(id, userOnClose); }; /* 这里传递给PMessageControl的data不会覆盖PMessage.vue中原有的data，而是与PMessage.vue中原有的data进行合并，类似 * 与mixin，包括传递methods、生命周期函数也是一样 */ let instance = new PMessageControl({ data: options }); // 传递vNode if(isVNode(instance.message)){ instance.$slots.default = [instance.message]; instance.message = null; } instance.id = id; // 渲染元素，随后使用原生appendChild将dom插入到页面中 instance.$mount(); let $el = instance.$el; // message弹窗的z-index由popupManager来提供 $el.style.zIndex = popupManager.getNextZIndex(); document.body.appendChild($el); // 将message显示出来 instance.show = true; console.log(instance) instances.push(instance); return instance; }; // message简化操作 ['success','error'].forEach(function (item) { Message[item] = options => { if(typeof options === 'string'){ options = { message: options } } options.type = item; return Message(options); } }); /** * 从instances删除指定message，内部使用 * @param id * @param userOnClose * @private */ Message._close = function (id, userOnClose) { for(var i = 0, len = instances.length; i = 0; i--){ instances.close(); } }; export default Message;

 let zIndex = 1000; let hasZIndexInited = false; const popupManager = { // 获取索引 getNextZIndex(){ if(!hasZIndexInited){ hasZIndexInited = true; return zIndex; } return zIndex++; } }; export {popupManager}; p-index.js import pMessage from './p-message.js'; export default pMessage; p-message.styl .p-message{ position: fixed; top: 20px; left: 50%; padding: 8px 15px; border-radius: 4px; background-color: #fff; color: #000; transform: translateX(-50%); transition: opacity .3s, transform .4s; &.message-fade-enter, &.message-fade-leave-to{ opacity: 0; transform: translateX(-50%) translateY(-30px); } &.message-fade-enter-to, &.message-fade-leave{ opacity: 1; transform: translateX(-50%) translateY(0); } &.error{ color: #ff3737; } .p-message-icon{ /* 使图标与内容能够垂直居中 */ display: table-cell; vertical-align: middle; width: 64px; height: 45px; &.p-message-icon-success{ background: url("../../assets/images/icons/message-icon/icon_success.png-600") no-repeat 0 0; } &.p-message-icon-error{ background: url("../../assets/images/icons/message-icon/icon_error.png-600") no-repeat 0 0; } } .p-message-content{ /* 使图标与内容能够垂直居中 */ display: table-cell; vertical-align: middle; padding-left: 15px; } }

 // 引入pMessage组件 import pMessage from './components/p-message/p-index.js'; // 将pMessage绑定到Vue.prototype中。这样在组件中就可以通过this.$pMessage()的形式来使用了 Vue.prototype.$pMessage = pMessage;