A promise that settles *at least* after the given delay

discernablePromise.js

// A promise that won't resolve or reject before the delay
// Might be used for giving time for an UI update & reset to be seen
const discernablePromise = (genuine, delay = discernablePromise.SENSIBLE_DELAY) => {
  return new Promise((resolve, reject) => {
    Promise.allSettled([
      genuine, 
      new Promise(resolve => setTimeout(resolve, delay))
    ])
      .then(results => {
        if (results[0].status === 'fulfilled') {
          resolve(results[0].value);
        } else {
          reject(results[0].reason);
        }
      });
  });
};
Object.defineProperty(discernablePromise, 'SENSIBLE_DELAY', { value: 150 });