Hello John,
The apps are not composed just by one file. For example, every app's view HTML is placed in different files. You can investigate a bit the "_Compiled" directory of the app, if you wanted.
On the other hand, if you refer to the Javascript code, once compile it, you can open the app's core Javascript file from the App menu. This can be useful sometimes and in some scenarios.
Please, go ahead if you have any further questions.
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