Singe Page App Express Utility

serve-spa.js

// Serve a single page application (web-client)
const path = require('path')
const Express = require('express')

module.exports = function serveSpa ({ app, omit, public }) {
  if (!omit) omit = () => false
  app
    .use(Express.static(public))
    .get('*', (req, res, next) => {
      if (req.accepts('html') && !omit(req)) {
        return res.sendFile(path.join(public, 'index.html'))
      }
      return next()
    })
}

// example code
// const app = Express()
// serveSpa({
//   app,
//   public: path.join(__dirname, '../public'),
//   omit: req => /graphql/.test(req.url)
// })