The app page names only what it loads at start. The composer, settings,
viewers and the rest were fetched when first used, and after every deploy
that first use waited on the server -- and the worker's tidy-up dropped
them again at the next deploy anyway.
The build now writes the list of all its files into the page as an inert
JSON block. The service worker keeps everything listed and, once a page
names files it does not hold, fetches them three at a time; a load cut
short is resumed at the next navigation. Language catalogs are listed
apart and left to be cached when used, and nothing is fetched ahead when
the browser is set to save data.
jcoffey
4c67460450