- From: Daniel Holbert via GitHub <sysbot+gh@w3.org>
- Date: Mon, 30 Sep 2024 05:19:54 +0000
- To: public-css-archive@w3.org
> From @dholbert: > > > FWIW there is a scrollByPages API in Firefox, non-standard: https://developer.mozilla.org/en-US/docs/Web/API/Window/scrollByPages Indeed; I'm pretty sure this is how we implement the `Space/PageDown` and `PageUp` scrolling actions under-the-hood (as calls to `scrollByPages(1)` and `scrollByPages(-1)`, from Firefox's frontend JS). But the JS API is also exposed to the web, too, for historical reasons I guess. The [`scrollByPages()` implementation is here](https://searchfox.org/mozilla-central/rev/72d959d715d3f832328057600811c09ee5195ae1/dom/base/nsGlobalWindowInner.cpp#3909-3926) if anyone's curious to see it. That function calls a generic C++ `ScrollBy()` function that's shared by a bunch of programmatic scrolling APIs, and the most relevant piece there for `scrollByPages` is the [`GetPageScrollAmount()`](https://searchfox.org/mozilla-central/rev/72d959d715d3f832328057600811c09ee5195ae1/layout/generic/ScrollContainerFrame.cpp#5161-5192) function, which defines what it means to scroll by a page. -- GitHub Notification of comment by dholbert Please view or discuss this issue at https://github.com/w3c/csswg-drafts/issues/10914#issuecomment-2382134833 using your GitHub account -- Sent via github-notify-ml as configured in https://github.com/w3c/github-notify-ml-config
Received on Monday, 30 September 2024 05:19:55 UTC