What is a 'Client Action' in OutSystems?

A 'Client Action' in OutSystems refers to a client-side logic that is executed on the user's device, specifically designed to manage and respond to user interactions and UI events. This includes tasks such as updating the user interface dynamically, responding to button clicks, managing animations, or any other actions that need to take place immediately in response to user behavior without needing to communicate with the server.

Client Actions are critical for delivering a smooth and responsive user experience in mobile applications because they allow developers to handle events and manipulate the UI instantly, ensuring that the user's actions are reflected immediately. This reduces latency and enhances overall app performance by minimizing server round trips, which can be time-consuming.

In contrast, the other options pertain to different aspects of application logic: server-side logic focuses on data processing, background processes usually involve tasks that do not require immediate user interaction, and error handling mechanisms are specifically intended for managing exceptions and ensuring application stability rather than for direct user interactions.