Using Node.js async readline

better.js

import readline from 'node:readline'

async function ask(query) {
	const rl = readline.createInterface({ input: process.stdin, output: process.stdout, tabSize: 4 });

	return new Promise((resolve) => rl.question(query, (answer) => {
		rl.close();
		resolve(answer);
	}));
}

export { ask }

index.js

import { getQuestion } from './readline.js'

const [question, close] = getQuestion()

let input = await question('Please input a number')
console.log(`The number is: ${input}.`)

close()

readline-example.js

import readline from 'node:readline/promises';
import { stdin as input, stdout as output } from 'node:process'

function getQuestion() {
	const rl = readline.createInterface({ input, output });
	return [rl.question.bind(rl), rl.close.bind(rl)]
	// Use like this:
	// const [question, close] = getQuestion()
}

const [question, close] = getQuestion()
let answer = await question('What do you think of Node.js? ');
// You can use question multiple times. But don't forget to close when you're done.
console.log(`Thank you for your valuable feedback: ${answer}`);
close()

readline.js

import readline from 'node:readline/promises';
import { stdin as input, stdout as output } from 'node:process'

function getQuestion() {
	const rl = readline.createInterface({ input, output });
	return [rl.question.bind(rl), rl.close.bind(rl)]
	// Use like this:
	// const [question, close] = getQuestion()
}

export { getQuestion }