Frontend & browser·Modules, bundling and the build
you deployed a fix and users kept getting the old file until you changed its name.
Cache busting
Also calledcache invalidation by URL, versioned asset
Forcing a fetch of a changed asset by changing the URL it lives at, rather than trying to persuade caches to expire. Query strings were the old approach and are unreliable in intermediate caches; a content hash in the filename is the current one. Anything served without a hash — the HTML entry point, a service worker script — needs a short cache lifetime instead, because that is the only lever left.