What do you call an interactive component created using HTML and JavaScript that can be added to pages or applications?

The interactive component created using HTML and JavaScript that can be added to pages or applications is known as a Lightning Component. This framework is part of the Salesforce Lightning platform and allows developers to build responsive, dynamic user interfaces. Lightning Components leverage modern web standards and provide a comprehensive way to create reusable and modular functionality across the Salesforce ecosystem.

This is particularly beneficial because these components can be integrated into Lightning Experience, the Salesforce mobile app, and standalone apps, enhancing user experience and application performance. The component-based architecture encourages reusability, which can significantly reduce development time and effort.

In contrast, Visualforce pages, while also allowing for custom interfaces, rely on older web standards and do not offer the same level of interactivity and modularity as Lightning Components. Apex classes are server-side logic scripts that do not provide user interface elements directly. Record-triggered flows are automation tools for business processes that primarily focus on data manipulation and workflow management rather than on creating interactive UI components.