Blazor ComboBox Example - Popup Resize

This example demonstrates the ComboBox popup’s custom resizing capability, enabling users to resize the suggestion panel to match viewing preferences and layout constraints. Resizing improves visual management of popup content for dense or sparse suggestion sets while preserving the component’s standard selection and submission behavior.

Enable resizing by setting the AllowResize property to true. When enabled, a drag handle appears in the popup’s bottom‑right corner; users can grab that handle to change both width and height interactively without altering the ComboBox value or keyboard navigation semantics.

Use the drag handle to adjust dimensions in real time. The popup updates immediately as the handle is moved, allowing users to expand the visible area to inspect longer lists or reduce it to conserve screen space. This immediate feedback facilitates quicker scanning of suggestions and minimizes repetitive scrolling when reviewing results.

• Enable resize via AllowResize = true.
• Use the bottom‑right drag handle to resize the popup interactively.
• Adjust popup width and height to suit content density or layout constraints without affecting selection behavior.

The resizing feature is intended purely for visual presentation; it does not change how items are filtered, selected, or submitted. Implementers can combine AllowResize with existing styling and popup configuration to deliver a flexible suggestion panel that adapts to device and content requirements.

For consistent behavior, test resizing with the target datasets and layout breakpoints to ensure the resized popup maintains accessibility, focus management, and expected interaction patterns across screen sizes and input modalities.