This is the React comment box example from the React tutorial.
npm install express
npm install body-parser
node server.js
And visit http://localhost:3000/. Try opening multiple tabs!
Use latest express version (express@4.13.3) and body-parser(body-parser@1.13.3) update to use CDN in China (cdn.staticfile.org), the origin CDS is blocked by GWF in China.