Required & Invalid Radio Groups

Testing results and explanation in my post Support for Marking Radio Buttons Required, Invalid.

1. Uses required on <fieldset>

Carb

2. Uses aria-required on <fieldset>

Meat

3. Uses aria-required, aria-invalid on <fieldset>

Protein

This is an error message.

4. Uses required with radiogroup Role

Vegetable

5. Uses aria-required with radiogroup Role

Fruit

6. Uses aria-required, aria-invalid with radiogroup Role

Spice

This is an error message.

Notes