vue项目中仿element-ui弹框效果的实例代码

import Message from './src/main.js';
export default Message;

import Vue from 'vue';
import Main from './main.vue';
let MessageConstructor = Vue.extend(Main);
let instance;
let instances = [];
let seed = 1;
const Message = (options = {}) => {
 if (typeof options === 'string') {
 options = {
  message: options
 };
 }
 let userOnClose = options.onClose;
 let id = 'message_' + seed++;
 options.onClose = function() {
 Message.close(id, userOnClose);
 };
 instance = new MessageConstructor({
 data: options
 });
 instance.id = id;
 instance.vm = instance.$mount();
 document.body.appendChild(instance.vm.$el);
 instance.vm.visible = true;
 instance.dom = instance.vm.$el;
 instance.dom.style.zIndex = 999;
 instances.push(instance);
 return instance.vm;
}
['success', 'warning', 'info', 'error'].forEach(type => {
 Message[type] = options => {
 if (typeof options === 'string') {
  options = {
  message: options
  };
 }
 options.type = type;
 return Message(options);
 };
});
Message.close = function(id, userOnClose) {
 for (let i = 0, len = instances.length; i < len; i++) {
 if (id === instances[i].id) {
  if (typeof userOnClose === 'function') {
  userOnClose(instances[i]);
  }
  instances.splice(i, 1);
  break;
 }
 }
};
Message.closeAll = function() {
 for (let i = instances.length - 1; i >= 0; i--) {
 instances[i].close();
 }
};

export default Message;

<template>
 <transition name="message-fade">
  <div :class="[
   'message',
   type && !iconClass ? `message-${ type }` : '',
   center ? 'center' : '',
   showClose ? 'closable' : '',
   customClass
   ]"
    v-show="visible"
    @mouseenter="clearTimer"
    @mouseleave="startTimer">
   <i :class="iconClass" v-if="iconClass"></i>
   <i :class="typeClass" v-else></i>
   <slot>
    <p v-if="!dangerouslyUseHTMLString" class="message-content">{{ message }}</p>
    <p v-else v-html="message" class="message-content"></p>
   </slot>
   <i v-if="showClose" class="message-close-btn icon-close" @click="close"></i>
  </div>
 </transition>
</template>
<script>
 const typeMap = {
 success: 'success',
 info: 'info',
 warning: 'warning',
 error: 'error'
 };
 export default {
 data () {
  return {
  visible: false,
  message: '',
  duration: 1000,
  type: 'info',
  iconClass: '',
  customClass: '',
  onClose: null,
  showClose: false,
  closed: false,
  timer: null,
  dangerouslyUseHTMLString: false,
  center: false
  }
 },
 computed: {
  typeClass() {
  return this.type && !this.iconClass
   ? `message-icon icon-${ typeMap[this.type] }`
   : '';
  }
 },
 watch: {
  closed(newVal) {
  if (newVal) {
   this.visible = false;
   this.$el.addEventListener('transitionend', this.destroyElement);
  }
  }
 },
 methods: {
  destroyElement() {
  this.$el.removeEventListener('transitionend', this.destroyElement);
  this.$destroy(true);
  this.$el.parentNode.removeChild(this.$el);
  },
  close() {
  this.closed = true;
  if (typeof this.onClose === 'function') {
   this.onClose(this);
  }
  },
  clearTimer() {
  clearTimeout(this.timer);
  },
  startTimer() {
  if (this.duration > 0) {
   this.timer = setTimeout(() => {
   if (!this.closed) {
    this.close();
   }
   }, this.duration);
  }
  },
  keydown(e) {
  if (e.keyCode === 27) { // esc关闭消息
   if (!this.closed) {
   this.close();
   }
  }
  }
 },
 mounted() {
  this.startTimer();
  document.addEventListener('keydown', this.keydown);
 },
 beforeDestroy() {
  document.removeEventListener('keydown', this.keydown);
 }
 }
</script>
<style lang="less">
 .message {
  min-width: 200px;
  box-sizing: border-box;
  border-radius: 3px;
  border: 1px solid #ebeef5;
  position: fixed;
  left: 50%;
  top: 20px;
  transform: translateX(-50%);
  background-color: #edf2f3;
  transition: opacity 0.3s, transform .4s;
  overflow: hidden;
  padding: 10px;
  display: flex;
  align-items: center;
 }
 .message-icon{
  width: 15px;
  height: 15px;
  border-radius: 100%;
  background: #fff;
  display: inline-block;
  margin-right: 10px;
  &.icon-success{
   background: url("../../../assets/image/icon-success.png") no-repeat center center;
   background-size: auto 100%;
  }
  &.icon-error{
   background: url("../../../assets/image/icon-error.png") no-repeat center center;
   background-size: auto 100%;
  }
  &.icon-info{
   background: url("../../../assets/image/icon-info.png") no-repeat center center;
   background-size: auto 100%;
  }
  &.icon-warning{
   background: url("../../../assets/image/icon-warning.png") no-repeat center center;
   background-size: auto 100%;
  }
 }
 .message-success{
  background: #f2f8ec;
  border-color: #e4f2da;
  .message-content{
   color: #7ebe50;
  }
 }
 .message-error{
  background: #fcf0f0;
  border-color: #f9e3e2;
  .message-content{
   color: #e57470;
  }
 }
 .message-warning{
  background: #fcf6ed;
  border-color: #f8ecda;
  .message-content{
   color: #dca450;
  }
 }
 .message-info{
  background: #eef2fb;
  border-color: #ebeef4;
  .message-content{
   color: #919398;
  }
 }
 .message-fade-enter,
 .message-fade-leave-active {
  opacity: 0;
  transform: translate(-50%, -100%);
 }
</style>

this.$message({
  message: '提示消息',
  type:'error' //type有四个值 1.error 2.success 3.info 4.warning
});