Not really that surprising, since there is no way to apply the correct aria-selected and aria-expanded attributes using just CSS. (You can apply the correct ARI

Not really that surprising, since there is no way to apply the correct aria-selected and aria-expanded attributes using just CSS. (You can apply the correct ARIA roles in the HTML though, just not save the change of state.) It's a shame there is not a native HTML tab construction, since you really shouldn't need JS to make tabs. Using the radio buttons to set active state is a clever hack, but it's not what they were intended for. Ref: WAI-ARIA section on tabs: https://www.w3.org/TR/wai-aria-1.1/#tab https://www.w3.org/TR/wai-aria-1.1/#tab