how to console.log before prompt

Question

How to avoid this stupid behaviour - prompt dialog brakes the code I need to decide what to enter into the dialog.

In this case that's the console.log. How to get prompt dialog after console is written.

$('.selx').on('change', function(){
  let a = $(this).val();
  console.log(a);
  let b = prompt('NEW TITLE');
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select class='selx'>
<option value='323'>lorem</option>
<option value='525'>ipsum</option>
</select>

Answer 1

The console is asynchronous (there is always a small delay, usually you won't notice it). Calling prompt will halt everything else going on on the tab, including the console. Therefore you have to add a small delay to enable the browser updating the console before prompting:

 $('.selx').on('change', function(){
   let a = $(this).val();
   console.log(a);
   setTimeout(() => {
      let b = prompt('NEW TITLE');
   }, 10);
 });