Never take over single keys

How to do it

Make shortcuts need a modifier, such as Ctrl or Alt. Or make them work only while their widget has focus. Never act on a single key press while focus is in a text field.

Example

<script>
  document.addEventListener('keydown', event => {
    if (event.key === 'k' && (event.ctrlKey || event.metaKey)) openSearch();
  });
</script>

How to check

A browser test presses each letter and digit with focus on the page body. Nothing changes on the page.