Rail scrollbar v2: delegated + lazy — survives app re-renders #29

Merged

Cordy merged 2 commits from rail-scrollbar-v2 into main

2026-09-06 00:28:14 +00:00

Cordy commented

2026-09-06 00:27:59 +00:00

Owner

Nikola's live finding: thumb worked on docs, absent on account and staff. Diagnosed in-page: v1 attached the thumb once at load, and account.html/admin.html re-render their rail after auth, wiping it (docs never re-renders). v2 replaces the init pass with one capture-phase document scroll listener that lazily creates or reuses the thumb on whichever .railscroll is scrolling — self-healing under any re-render, and correct by construction since the thumb only needs to exist while scrolling. Same CSS; canonical snippet updated.

Nikola's live finding: thumb worked on docs, absent on account and staff. Diagnosed in-page: v1 attached the thumb once at load, and account.html/admin.html re-render their rail after auth, wiping it (docs never re-renders). v2 replaces the init pass with one capture-phase document scroll listener that lazily creates or reuses the thumb on whichever `.railscroll` is scrolling — self-healing under any re-render, and correct by construction since the thumb only needs to exist while scrolling. Same CSS; canonical snippet updated.

Cordy added 2 commits

2026-09-06 00:28:00 +00:00

Rail scrollbar v2: delegated + lazy, survives app re-renders (#25 ) 0b76e19855

v1 attached the thumb once at load; account.html and admin.html re-render
their rail after auth, wiping it (docs, which never re-renders, worked -
Nikola's live finding). v2 is one capture-phase document scroll listener
that lazily creates or reuses the thumb on whichever .railscroll is
scrolling - self-healing under any re-render, no init pass needed since
the thumb only exists while scrolling.

RailScroll canonical snippet: v2 (delegated + lazy) cfae5713cc