父组件 App.vue
<template>
<div>
<header-vue :msg="msg"></header-vue>
<body-vue></body-vue>
<footer-vue></footer-vue>
</div>
</template>
<script>
export default{
data(){
return{
msg:"这是一个aaa"
}
},
methods:{
}
}
</script>
<style>
</style>
子组件header.vue
<template>
<div>头部{{msg}}</div>
</template>
<script>
export default{
data(){
return{
}
},
props:['msg']
}
</script>
<style scoped>
div{
background: blue;
}
</style>