浏览量 4470
2019/01/08 14:40
Header.vue
<template>
<header v-on:click="changetitle">
<h1>{{title}}{{title1}}</h1>
</header>
</template>
<script>
export default {
name: 'app-header',
props: {
title1: {
type: String
}
},
data() {
return {
title: 'Vue.js Demo'
}
},
methods: {
changetitle: function () {
// this.title1 = 'changed';
this.$emit("titleChanged","子to父组件传值");
}
},
beforeCreate:function () {
alert("beforeCreate,组件实例化之前执行的函数");
},
created:function () {
alert("created,组件实例化完毕,但页面还未显示");
},
beforeMount:function () {
alert("beforeMount,组件挂载前,页面仍未显示,但虚拟dom已经配置");
},
mounted:function () {
alert("mounted,组件挂载后,此方法执行后,页面显示");
},
beforeUpdate:function () {
alert("beforeUpdate,组件更新前,页面仍未更新,单虚拟dom已经配置");
},
updated:function () {
alert("updated,组件更新,此方法执行后,页面显示")
},
beforeDestroy:function () {
alert("beforeDestroy,组件销毁前");
},
destroyed:function () {
alert("destroyed,组件销毁");
}
}
</script>
<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped>
header {
background: lightgreen;
padding: 10px;
}
h1 {
color: #222;
text-align: center;
}
</style>