node.js three characteristics

node.js is Chrome-V8 server-side JavaScript runtime based

• The latest version of node support ES6 syntax (see: http://node.green )

• node.js has three major characteristics:
  1. Single-threaded
  2. Polling events
  3. Asynchronous non-blocking

• Such that the above-described three features has the advantage of high concurrent node.js, but having