yarn add vue-meta

npm install vue-meta --save

import Vue from 'vue'
import Router from 'vue-router'
import Meta from 'vue-meta'
 
Vue.use(Router)
Vue.use(Meta)
 
export default new Router({
 // ...
})

import { app, router, store } from './app'
 
const isDev = process.env.NODE_ENV !== 'production'
const meta = app.$meta() // 這行
 
export default context => {
 router.push(context.url)
 context.meta = meta // 這行
 const ss = isDev && Date.now()
 // ...
}

renderStream.once('data', () => {
 res.write(indexHTML.head)
})

renderStream.once('data', () => {
 const { title, meta } = context.meta.inject()
 indexHTML.head = indexHTML.head.replace(/<title.*?<\/title>/g, title.text())
 indexHTML.head = indexHTML.head.replace(/<meta.*?name="description".*?\/>/g, meta.text())
 res.write(indexHTML.head)
})

<title>xxxx</title>

<meta name="description" content="xxxx">

export default {
 name: 'frontend-index',
 prefetch: fetchInitialData,
 // 添加以下代碼
 metaInfo () {
 const title = 'M.M.F 小屋 - 首頁(yè)'
 return {
  title,
  meta: [{ vmid: 'description', name: 'description', content: title }]
 }
 }
}

export default {
 name: 'frontend-article',
 prefetch: fetchInitialData,
 // 添加以下代碼
 metaInfo () {
 const title = this.article.title
 return {
  title: title + ' - M.M.F 小屋',
  meta: [{ vmid: 'description', name: 'description', content: title + ' M.M.F 小屋' }]
 }
 }
}