office-ui-fabric-react/src/components/Modal/docs/ModalA11y.md

Reusable React components for building experiences for Office 365.

- Use `aria-labelledby` and `aria-describedby` on modal container to associate the title and description.
- Use `aria-modal=true` on the modal container.
- In case of modal dialog, the default focus should be on the least destructive control.