What are some best practices for modal dialogs?

When implementing a modal dialog, it is important to apply ARIA roles correctly. Use the role="dialog" attribute and include a clear heading within the modal. The dialog should use aria-labelledby to reference this heading, so that screen readers can announce the modal’s purpose to users.

You also need to manage focus properly:

• Trap focus within the modal while it is open. Users should not be able to navigate to or interact with content outside the modal.
• Keep keyboard focus contained inside the modal until it is closed.

Finally, ensure that the modal is fully operable for all users. It must be closable using a keyboard, not just a mouse.

These practices help provide a clear, predictable, and accessible experience for users interacting with modal dialogs.