| title | string | — | Heading rendered when no header snippet is passed. |
| titleClass | string | '' | Extra classes for the title element. |
| className | string | '' | Extra classes for the dialog panel. |
| maxWidth | 'md' | … | '7xl' | 'fit' | 'wide' | 'md' | Panel width variant. |
| height | 'auto' | 'fixed' | 'tall' | 'auto' | Panel height variant. |
| pending | boolean | false | Disables dismissal while an operation runs. |
| allowPendingCancel | boolean | false | Keeps dismissal enabled while pending. |
| dismissKeydownCapture | boolean | true | Registers the capture-phase Escape/Tab handler. |
| fullscreen | boolean | false | Fills the viewport on an opaque surface. |
| closeLabel | string | locale | Overrides the close accessible name. |
| onCancel | () => void | — | Called by every dismissal affordance. |
| header | Snippet | — | Replaces the title with custom header markup. |
| children | Snippet | — | Dialog body content. |