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How to Handle the Classic Browser Back-Cache Problem in Web App Development
Browser back-cache, often called bfcache, is one of those web app behaviors that looks helpful to users but can create strange bugs for developers. When a user moves away from a page and then presses the Back button, the browser may restore the previous page from memory instead of loading it again from the server. This makes the page appear instantly, which is great for speed, but it also means JavaScript state, form values, timers, authentication status, and old API data may return exactly as they were before. For many web apps, this creates confusing issues such as stale screens, duplicated actions, broken sessions, and pages that look alive but are no longer in sync with the server.
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