Did you know?

The widget build method can potentially be called in every frame and should not have any side effects.

Here’s a list of DOs and DON’Ts. 👇

The build method: DOs and DON'Ts
The build method: DOs and DON'Ts

Conversely, you can run side effects inside widget callbacks, since these are triggered by separate events that are not part of the rendering phase.

Do these inside widget callbacks
Do these inside widget callbacks

I’ve written a complete article about side effects.

If you got this wrong before, it will help you. 👇

Happy coding!