How do multiple sibling components in Vue.js share a common component?

[question]: how do multiple sibling components share a common component?
[description]: enter my website and correspond to different components according to the route (hereinafter referred to as component 1). Among these components, there is also a common part (hereinafter collectively referred to as component 2), but in the public part, some data in it, I need to transmit different data according to component 1. How can this be implemented?
[effect]:

clipboard.png

clipboard.png

for example, at the top of figure 1 above, I want to pass both the title and the text, in the button according to component 1.
[Business]: the user clicks on the user information in figure 2 on the home page and jumps to figure 2 (user details interface). Other modules are similar.
[Code]: 

...
{ //2 router
    path: "/user", 
    name: "User", 
    meta: { ... }, 
    components: { 
        default: User, 
        footer: Footer 
    } 
}, {  //1 router
    path: "/user/detail", 
    name: "UserDetail", 
    meta: { ... }, 
    component: UserDetail
    //components: { 
        //default: UserDetail, 
        //header: Header  //2
     //} 
}
...

I want to use children in vue-router to implement it, but I find that I can"t do it.
I just entered the pit. How can I implement it? Give a train of thought is OK, the problem is a little rookie, do not like to spray, thank you!

Vue.js
Mar.21,2021

I know one way to use

in index.js 
Vue.component('header-item', {
  props: ['message', 'backUrl'],
  template: `...`
})

use

in other pages 
<header-item message="demo1" backUrl="/"></header-item>

but is there any other way? What is the general method used in the company's actual combat project?

method 2:
1, define a separate header.vue common component
code is as follows: (using iView) 

<template>
    <Layout>
        <Header>
            {{title}}
        </Header>
    </Layout>
</template>
<script>
    export default{
        props: ['title'],
        data () {
            return { }
        }
    }
</script>

2. Introduce it in vue-router/index.js as needed. The code is as follows: 

import Header from '**/Header'
...
{
  path: '/user/detail',
  name: 'Detail',
  meta: {...},
  components: {
    default: Detail,
    header: Header
  },
  props: {
    header: {
      title: ''
    }
  }
},
...

3, references in the page. The code is as follows: 

<router-view name="header"></router-view>

it is recommended that you define a separate vue component
control the display by passing values from parent and child components
import components in the desired page
the above method can, but the limitations are too great

you want to reuse the part separately encapsulated in a vue file, through props or vuex to state control.
component-based development is now a very important idea at the front end, it is recommended to learn.

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