I have the following JavaScript code:

document.addEventListener('keydown', function (event) {
  console.log('running keydown event listner func!');
  console.log(event.ctrlKey);
  console.log(event.key);
});

When I press Ctrl + k I see this in the console:

However, when I press Ctrl + e I see this:

As you can see, the e is totally ignored. Why is that? Is it me? Or is it a browser thing that I’m unaware of?