alerts.js

const nextTick = require('next-tick');

exports.alert = text => new Promise(resolve => nextTick(() => {
  alert(text);
  resolve();
}));

exports.confirm = text => new Promise(resolve => nextTick(() => {
  resolve(confirm(text));
}));

exports.prompt = (text, fallback) => new Promise((resolve, reject) => nextTick(() => {
  const result = prompt(text, fallback);
  if(result !== null) {
    resolve(result);
  } else {
    reject();
  }
}));