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Copying my comment from python/devguide#1784 (comment):

Nice little shortcut, but I'm concerned this will interfere with keyboard handling for people using assistive tech such as screen readers.

https://www.w3.org/WAI/ARIA/apg/practices/keyboard-interface/ includes:

So, screen reader users will commonly expect that pressing the right arrow key will expand a collapsed node.

https://webaim.org/techniques/keyboard/ has examples where ←/→ keys are needed.

Nice little shortcut, but I'm concerned this will interfere with keyboard handling for people using assistive tech such as screen readers.

https://www.w3.org/WAI/ARIA/apg/practices/keyboard-interface/ includes:

So, screen reader users will commonly expect that pressing the right arrow key will expand a collapsed node.

https://webaim.org/techniques/keyboard/ has examples where ←/→ keys are needed.

@hugovk keyboard shortcuts are disabled for these HTML elements - "TEXTAREA", "INPUT", "SELECT", "BUTTON" (https://github.com/sphinx-doc/sphinx/blob/cc7c6f435ad37bb12264f8118c8461b230e6830c/sphinx/themes/basic/static/doctools.js#L6-L11)

Is that enough for Python docs? The ARIA guidelines are too generic - they say "Consider, for example, a screen reader user operating a tree.", but as far as I can tell there are no expandable trees in Python docs.

My understanding is that screen readers use left and right to navigate character-by-character:

For example the left/right cursor keys are intercepted and used to move focus to the previous/next character in the content, and the up/down keys move focus to the previous/next line instead of scrolling the page.

https://tink.uk/understanding-screen-reader-interaction-modes/

While using screen reader such as NVDA, when left or right key is pressed, the screen reader reads the current or next element letter by letter.

https://stackoverflow.com/questions/70304270/while-using-screen-reader-such-as-nvda-how-to-press-left-or-right-key

Or for navigating table cells:

https://dequeuniversity.com/screenreaders/nvda-keyboard-shortcuts

So any other interception of arrow keys would be a problem.