Chrome Headless SSR for Old School

server.js

const puppeteer = require('puppeteer')
const express = require('express')
const app = express()

// page with angularjs application
const url = 'http://ng-seo.sourcelab.xyz/'

app.get('/', async function (req, res) {
  const browser = await puppeteer.launch()
  const page = await browser.newPage()
  
  await page.goto(url)

  // wait for element, make sure this element appears on router change completed 
  await page.waitForSelector('#main')
    
  const html = await page.evaluate(() => new XMLSerializer().serializeToString(document.doctype) + document.documentElement.outerHTML)
  
  res.send(html)

  await browser.close()
})

app.listen(3000, function () {
  console.log('app listening on port 3000!')
})