Continuous mode rendered every page (up to 2000) with loading="eager",
fetching and decoding the whole chapter up front — enough to OOM a mobile
tab on a long chapter. Eager-load only a leading window ([0..=eagerThrough],
covering the deep-link target + a lead, min 6 pages) and lazy-load the rest;
the browser fetches them as the reader scrolls near. Unloaded lazy pages
reserve height (page width x ~1.4) so they stay distinct scroll targets for
the progress IntersectionObserver, cleared on load.
Keeps the DOM dense so the scroll-to-?page=N effect, progress observer, and
next-chapter preload trigger are all unchanged. Rewrote reader-preload-window
spec to assert the eager/lazy attribute partition + deep-link scroll landing.
Bump to 0.124.2.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Eager-load every page of the current chapter rather than a bounded
rolling window, so pages are fetched up front (the browser paces them
over its per-origin connection limit, top-to-bottom = reading order)
instead of filling in as they're scrolled onto. This drops the
scrollLeadIdx/eagerThrough machinery in favour of a plain
`loading="eager"`.
The first few pages of the *next* chapter are already warmed when the
reader nears the end of the current one (the next-chapter preloader), so
flipping over stays instant.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Continuous mode eager-loaded only pages 0..=initialIndex; everything
below stayed `loading="lazy"`, so pages fetched and reflowed in as they
scrolled into view. Now a rolling window eager-loads a few pages ahead of
the reading position (PRELOAD_AHEAD) so they arrive — fetched and sized —
while still below the fold, then swap in without pop-in.
The window rolls forward off `scrollLeadIdx`, the top-of-viewport page
measured from live rects and guarded by `scrollY`. It deliberately does
not use the read-progress high-water mark: before images load they are
0-height and pile into the viewport, which would latch that mark to the
last page and eager-load the whole chapter on open. Pages past the window
stay lazy so opening a long chapter doesn't fetch every page at once.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
