radio
A checkable input in a group of elements with the same role, only one of which can be checked at a time.
Widget roles act as standalone user interface widgets or as part of larger, composite widgets.
Description
A checkable input in a group of elements with the same role, only one of which can be checked at a time.
Authors SHOULD ensure that elements with role radio are explicitly grouped in order to indicate which ones affect the same value. This is achieved by enclosing the radio elements in an element with role radiogroup. If it is not possible to make the radio buttons DOM children of the radiogroup, authors SHOULD use the aria-owns attribute on the radiogroup element to indicate the relationship to its children.
Example
Characteristics
Semantic HTML
Reference