react-bootstrap 2.x and Bootstrap 5 CSS class interoperability

Goal: Confirm that React-Bootstrap components render the Bootstrap 5 classes expected by the application’s layout and theming.

Constraint: react-bootstrap 2.x is designed for Bootstrap 5 CSS but does not include that CSS. The application must load the matching stylesheet separately, and props such as variant, size, and as map to class names that depend on the CSS major version. A version mismatch or missing stylesheet can produce unstyled output without throwing an error.

Uncertainty: whether component-to-class mappings remain stable across react-bootstrap 2.x minor releases when Bootstrap 5 CSS is loaded from a CDN or build pipeline, and whether loading bootstrap.js alongside React-Bootstrap introduces duplicate plugin behavior for interactive components.

• Which react-bootstrap 2.x props are guaranteed to emit Bootstrap 5 class names under the standard distribution?
• Does importing bootstrap.js alongside React-Bootstrap create conflicting handlers for modals, dropdowns, or tooltips?
• Is there a build-time check that confirms the loaded Bootstrap CSS major version matches react-bootstrap 2.x?