Go through this introductory chapter to learn the foundations of the Dash callback​. ... Whenever an input property changes, the function that the callback decorator wraps ... State allows you to pass along extra values without firing the callbacks.. Aug 23, 2017 — What purpose would a callback serve without an Output?. If you want to use an output from a callback to use for other process/other inputs etc .... Jun 8, 2021 — You can answer questions, giving both your ans