question promisify

question_promisify.js

const readline = require('readline')
const util = require('util')
const rl = readline.createInterface({input: process.stdin, output: process.stdout})
rl.question[util.promisify.custom] = (arg) => {
  return new Promise((resolve) => {
    rl.question(arg, resolve);
  });
};
const questionPromise = util.promisify(rl.question);
questionPromise('What do you think of Node.js? ').then((answer) => {
  console.log(answer);
  rl.close();
});