Imagine I have developed an AngularJS application that lazy loads controller files (using $scriptjs) and all dependencies when the user navigates to a specific route. This application consists of 3 routes: A, B, and C.
My question is: if the user navigates from route A to route B and then back to route A, will the files for route A be loaded into memory twice, or does the browser intelligently cache them and retrieve them as needed?
When a user loads external javascript files, the browser will cache them for future use. This means that if the scripts have already been loaded once, the browser will recognize this and not call them again.
In Firefox, you can observe this process by using the firebug extension. By looking at the Net tab in firebug, you can view all the javascript files being loaded on a particular page. Once they are cached, their file names will appear in light grey indicating that they are stored in the cache.
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