1249872 - Don't we need to support ScrollLock on Windows?

Status: NEW

(Core :: DOM: UI Events & Focus Handling, enhancement)

Description

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)(PTO: 9/8)]

Currently, only Windows support ScrollLock modifier (Linux also does it, but typical distributions don't support it as a modifier) since we've already supported KeyboardEvent.getModifierState("ScrollLock"). However, we've never use ScrollLock modifier on our UI.

If we improve XUL <key> element, we can add additional shortcut keys for ScrollLock.

As far as I tested, no other browsers do nothing special when I press ScrollLock + Arrow keys. And I found a document of FAQ of Excel which supports ScrollLock. But according to the document, ScrollLock may make users confused as I guessed.

So, ScrollLock shouldn't work with usual cases (e.g., force scroll <textarea> with allow key). But there might be better scenario we add new shortcut keys.

Do you have any ideas?


I wonder, in caret mode, scrolling with ScrollLock + Arrow keys might be useful, but I'm not sure.

Comment 1

[Masayuki Nakano [:masayuki] (he/him)(JST, +0900)(PTO: 9/8)]

Another idea is, arrow keys/PageDown/PageUp with ScrollLock may be "reserved". I.e., even if web apps don't allow to scroll, users can scroll focused element forcibly.