In which scenario is it necessary to use modal containers?

Using modal containers is particularly advantageous when there is a need to dynamically include specific components based on conditions. Modal containers are designed to overlay on the main application interface and can adapt their content in response to user interactions or specific states within the application. This flexibility allows developers to create more interactive and context-sensitive user experiences within their applications.

For instance, when a certain condition is met—such as a user selecting an option that requires additional input—a modal can be populated with relevant fields or components that guide the user through the necessary steps. This dynamic nature ensures that the information displayed is always pertinent to the user's current actions, making modal containers a powerful tool for enhancing interactivity and user engagement in the application.

In contrast, options that suggest notification displays without user interaction, preserving user choices, or displaying static information do not inherently require the dynamic capabilities that a modal container provides. Notifications typically utilize simpler dialog boxes that do not need the advanced interaction cues offered by modal containers, and static information can be shown directly on the page without the need for a modal overlay.