Handle promises better

[bahmutov]

For example

const promises = [Promise.resolve(20), Promise.resolve(30)]
// promises: [{},{}]
Promise.all(promises)
  .then(console.log)

should produce

const promises = [Promise.resolve(20), Promise.resolve(30)]
// promises: [Promise(20), Promise(30)]

[bahmutov]

Hmm, does this mean that we need to collect all variable promises and wait for them after the end of the execution?