user90002

Most recent activity

• Promises?

  in JavaScript • 5 years, 11 months

  

  I try use promise, but it's work strange:

  const p = new Promise(function(resolve, reject) {
    setTimeout(resolve, 100);
    setTimeout(reject, 200);
  });
  
  p.then(function() {
      console.log('resolved');
  }).catch(function() {
      console.log('rejected');
  });
  

  output:

  resolved
  Uncaught Error: Unhandled promise rejection: undefined

  Bolded text printed, because reject called after resolve, but promise must be ignore change state at second call.

  And what about async\await?