<template>
 <div v-show="visible" class="Alert">
  <i v-show="closable" class="iconhandle close" @click="close"></i>
  <slot></slot>
 </div>
</template>

<transition name="alert-fade">
</transition>

export default {
 name: 'Alert',

 props: {
  closable: {
   type: Boolean,
   default: true
  },
  show: {
   type: Boolean,
   default: true,
   twoWay: true
  },
  type: {
   type: String,
   default: 'info'
  }
 },
 data() {
  return {
   visible: this.show
  };
 },
 methods: {
  close() {
   this.visible = false;
   this.$emit('update:show', false);
   this.$emit('close');
  }
 }
};

import Alert from './Alert.vue'

Alert.install = function(Vue){
  Vue.component('Alert', Alert);
}
export default Alert

<Alert :closable="false">
 这是一个不能关闭的alert
</Alert>
<Alert>
 这是一个可以关闭的alert
</Alert>