callbackify

callbackify.js

'use strict';

const {
  callbackify
} = require('util');

const asyncFn = async function (text) {
  if (text === true) {
    return await Promise.reject(`parce, no me mande un true !!!`);
  }
  return await Promise.resolve(`Hola, ${text}`);
};

const callbackAsyncFn = callbackify(asyncFn);

module.exports = {
  asyncFn,
  callbackAsyncFn
};

index.js

'use strict';

const {
  asyncFn,
  callbackAsyncFn
} = require('./modules/util');

callbackAsyncFn('jesse callback', (error, result) => {
  if(error) {
    console.log('error callback', error.message || error);
  };
  console.log('callback', result);
});

asyncFn('jesse promise').then((result) => {
  console.log('promise', result);
}).catch((error) => {
  console.log('error promise', error.message || error);
});