v5: Offcanvas ESC keypress doesn't prevent default

Created by: moeriki

Prerequisites

• I have searched for duplicate or closed issues
• I have validated any HTML to avoid common problems
• I have read the contributing guidelines

Describe the issue

Pressing "Escape" in an open Offcanvas closes it. But the event is propagated to the browser which (ao) makes the browser leave fullscreen mode.

This behaviour is correct in other overlay components such as dropdown and modal.

Reduced test cases

https://codepen.io/moeriki/pen/rNGLBvW

What operating system(s) are you seeing the problem on?

macOS

What browser(s) are you seeing the problem on?

Safari, Firefox

What version of Bootstrap are you using?

v5.1.3

Fix

The fix might be just adding event.preventDefault() here…

https://github.com/twbs/bootstrap/blob/main/js/src/offcanvas.js#L194