MiniPrograms/subpkg/MyMsg/MyMsg.vue

<template>
	<view class="u-demo-block">
		<view class="u-demo-block-content">
			<view class="u-alert-item" v-for="(item,index) in msgList" :key="index">
				<u-alert :description="item" type="success" closable @click="deleteMsg(index)"></u-alert>
			</view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				msgList: ['1111','22222','333']
			};
		},
		methods:{
			deleteMsg(index){
				this.msgList.splice(index,null)
			}
		}
	}
</script>

<style lang="scss">
.u-alert-item{
	margin: 20rpx;
}
</style>