Are assets versioned by URL (/path/to/foo-1234abcd.js or /1234abcd/path/to/foo.js) or are they updated in-place (/path/to/foo.js, but now containing 'const vers

Are assets versioned by URL (/path/to/foo-1234abcd.js or /1234abcd/path/to/foo.js) or are they updated in-place (/path/to/foo.js, but now containing 'const version="1234abcd";')? If the first one, if you don't do it already, your reload header could act like a "preload" header ("Htmx-Preload-Root: 1234abcd") and tell the client which assets to start pulling even before a logical navigation click, so that they're hot in the cache when they eventually do that navigation.