storybookjs

storybook-ui

Every <button> needs a visible label or accessible name.

Don't set tabindex="-1" on a <frame> or <iframe> that contains focusable elements.

The color contrast between text and its background meets WCAG AA contrast ratio.

Have only one role="banner" or <header> on a page.

If you use multiple landmarks of the same type, give them unique labels (names).