Node. js Learning (3) ---- Server instance

Var http = require ('http'); http. createServer (function (req, res) {res. writeHead (200, {'content-type': 'text/plain '}); res. end ('Hello Node. js \ n ');}). listen (8080, "127.0.0.1"); console. log ("Server start at http: // 127.0.0.1: 8080 ");

The above instance is exited after execution. Why is it not exited after execution? The reason is the event listener of the activity. Node always starts an event loop. Here, the listen function creates an event listener that implements the HTTP protocol. This event listener puts index. js in the execution State until the terminal executes the exit operation, for example, Ctrl + C.