event-loop.js

const fs = require('fs');
const path = require('path');
const Event = require('events');
const event = new Event();

setImmediate(() => console.log('setImmediate')); // asynchronous 5

fs.lstat(path.join(__dirname, 'test.js'), () => console.log('fs')); // asynchronous 4

setTimeout(() => console.log('setTimeout')); // asynchronous 3

const interval = setInterval(() => { // asynchronous 3
  console.log('setInterval');
  clearInterval(interval);
});

Promise.resolve().then(() => console.log('Promise')); // asynchronous 2

process.nextTick(() => console.log('nextTick')); // asynchronous 1

event.on('test', () => console.log('event')); // synchronous

event.emit('test');

// event
// nextTick
// Promise
// setTimeout
// setInterval
// fs
// setImmediate