Which technology is primarily used for creating custom widgets in OutSystems?

Creating custom widgets in OutSystems primarily involves using HTML, CSS, and JavaScript. This combination allows developers to create rich, interactive UI components that can be seamlessly integrated into OutSystems applications.

HTML provides the structure of the custom widget, allowing developers to define the elements and layout. CSS is utilized for styling, enabling the customization of the look and feel to match the application's design requirements. JavaScript is essential for adding interactivity and dynamic behavior, enhancing the user experience within the widget.

While other technologies like PHP, SQL, Java, Kotlin, C#, and the .NET Framework are used in various contexts within OutSystems, they are not the primary technologies for developing custom widgets. PHP and SQL are more focused on backend development and data handling, while Java, Kotlin, C#, and the .NET Framework are primarily used for building server-side logic and functionalities within mobile and web applications, rather than UI components.