Customizing FastAPI's Swagger UI Behavior
Treat FastAPI's Swagger UI as a configurable frontend, not a static page. You can customize its behavior by passing a dictionary of settings on app startup. This is useful for changing themes or pre-filling auth fields. The footgun: keys must be camelCase.
Treat FastAPI's Swagger UI as a configurable frontend, not a static page. You customize it by passing a dictionary to the `swagger_ui_parameters` argument when creating your `FastAPI` app. This allows you to change themes, disable syntax highlighting for performance, or control how models are expanded by default. The footgun: parameter keys must be the exact camelCase strings the Swagger UI JavaScript library expects, not Pythonic snake_case, or they will be silently ignored.
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