Google Cloud Functions enable CORS?

Question

I just finished the Hello World Google Cloud Functions tutorial and received the following response headers:

Connection → keep-alive
Content-Length → 14
Cont         


        

Answer 1

You can use the CORS express middleware.

package.json

npm install express --save
npm install cors --save

index.js

'use strict';

const functions = require('firebase-functions');
const express = require('express');
const cors = require('cors')({origin: true});
const app = express();

app.use(cors);
app.get('*', (req, res) => {
    res.send(`Hello, world`);
});

exports.hello = functions.https.onRequest(app);