Adding a hash to JavaScript files under assets since they do not contain one by default. A hash is necessary in order to enable browser cache busting in case of new or updated assets. ^(assets/(.*)\.js$) %{attribute:cacheBust} Removing the hash from the JavaScript files under assets since internally they do not contain one. ^/ui/(.*assets/.*)\.(?!min)([^.]+)\.(js)$ public, max-age=31536000 /ui/$1.js Replacing the styles with the customized CSS if present ^styles-([^.]+)\.css$ %{attribute:customStyles} Login SPA root redirect ^/ui/$ ./app Cache JavaScript, CSS, fonts and images that have at least a 16 character hash for 1 year. Hash detection is a heuristic: files ending with a dot followed by at least 16 characters and one of the given file endings will be assumed to be hashed and therefore be cached for one year. ^/ui/.+\.[a-z0-9]{16,}\.(js|css|woff|eot|woff|ttf|png|svg|jpg|jpeg|tiff|gif)$ public, max-age=31536000 Never Cache anything for MSOFBA-related requests. ^/public/msofba/.*$ no-cache, no-store