The mutually exclusive radio buttons in their native format
The radio class is a simple wrapper around the
<input type="radio"> HTML elements. It is intentionally
not styled, to preserve cross-browser compatibility and the user experience.
Make sure the linked radio buttons have the same value for
their name HTML attribute.
You can check a radio button by default by adding the
checked HTML attribute to the
<input> element.
You can disable a radio button by adding the
disabled HTML attribute to both the
<label> and the <input>.