built-in alert box

        
  alert('An exception occurred.');
  event.target.nextElementSibling.textContent = 'The application has just got an exception.';
        
      

Simple Popup alternative

        
  simplePopup(0, 'An exception occurred.').then(function() {
    event.target.nextElementSibling.textContent = 'The application has just got an exception.';
  });
        
      

Alert Box

built-in confirm box

        
  var res = confirm('It\'s time to change. Do you agree with me?');
  if (res) {
    event.target.nextElementSibling.textContent = 'Yes, let\'s go for it.';
  } else {
    event.target.nextElementSibling.textContent = 'No, this is not the time.';
  }
        
      

Simple Popup alternative

        
  simplePopup(1, 'It\'s time to change. Do you agree with me?').then(function(res) {
    if (res) {
      event.target.nextElementSibling.textContent = 'Yes, let\'s go for it.';
    } else {
      event.target.nextElementSibling.textContent = 'No, this is not the time.';
    }
  });
        
      

Confirm Box

built-in prompt box

        
  var username = prompt('Please enter your username', 'Michael Jordan');
  if (username != null && username != '') {
    event.target.nextElementSibling.textContent = username + ', hey, welcome back.';
  }
        
      

Simple Popup alternative

        
  simplePopup(2, 'Please enter your username', 'Michael Jordan').then(function(res) {
    if (res) {
      event.target.nextElementSibling.textContent = res + ', hey, welcome back.';
    } else {
      event.target.nextElementSibling.textContent = 'Anoymous user logs in.';
    }
  });
        
      

Prompt Box