Cloud Functions for Firebase - Express example 2/3 - using middleware

CF4F-express|functionsES6|index-02.js

const functions = require("firebase-functions")
const cors = require("cors")
const express = require("express")

/* Express with CORS */
const app2 = express()
app2.use(cors({ origin: true }))
app2.get("*", (request, response) => {
  response.send("Hello from Express on Firebase with CORS!")
})

const api2 = functions.https.onRequest(app2)

module.exports = {
  api2
}