vue-meta/examples/ssr/server.js

import path from 'path'
import fs from 'fs-extra'
import template from 'lodash/template'
import { createRenderer } from 'vue-server-renderer'
import createApp from './App'

const renderer = createRenderer({ runInNewContext: false })

const templateFile = path.resolve(__dirname, 'app.template.html')
const templateContent = fs.readFileSync(templateFile, { encoding: 'utf8' })

// see: https://lodash.com/docs#template
const compiled = template(templateContent, { interpolate: /{{([\s\S]+?)}}/g })

process.server = true

export async function renderPage () {
  const app = await createApp()
  const appHtml = await renderer.renderToString(app)

  const pageHtml = compiled({
    app: appHtml,
    ...app.$meta().inject()
  })

  return pageHtml
}