NodeJS Read File

Blocking Version

const = {readFile, readFileSync} = require('fs');
const txt = readFileSync('hello.txt', 'utf8');
console.log(txt) // fires first
console.log('do this ASAP') // fires second (must wait for the blocking function)

NodeJS Events Version

const = {readFile, readFileSync} = require('fs');
const txt = readFileSync('hello.txt', 'utf8');
 
readFile('hello.txt', 'utf8', (err, txt) -> {
	console.log(txt)
}) // fires second after the 'do this ASAP'
console.log('do this ASAP') // fires first

NodeJS Promise Version

const {readFile} = require('fs').promises;
const file = await readFile('hello.txt', 'utf8')

the promise will be fulfilled in the asynchronous await call