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Chapter 6. Going Offline > Online Whitelist and Fallback Options
6.2. Online Whitelist and Fallback Options
It is possible to force the browser to always access certain resources over the network (this process is known as whitelisting). This means the browser will not cache them locally and they will not be available when the user is offline. To specify a resource as online only, use the NETWORK: keyword (the trailing : is essential) in the manifest file like so:
CACHE MANIFEST index.html scripts/demo.js styles/screen.css NETWORK: logo.jpg
