behavior: radio

Standard radio button implementation. Can be applied to any group of elements having the same name to achieve one-of-group checked functionality.

Elements

that have this behavior applied by default:

<input type="radio"> - standard HTML inline radio button;
<button type="radio"> - inline radio button, use it as <button|radio(group)>first</button> <button|radio(group)>second</button>.

that this behavior knows about:

checked - if provided will initialize value of runtime state of the flag checked.
name="groupname" - standard attribute name has special meaning for the radio: radio buttons with the same name constitute single group.
value="..." - standard value attribute (used by behavior:form).
as="string | integer | float | numeric | auto" - defines how value attribute is reported to script. By default value of element with value="42" will be just as a string "42" but value="42" as="integer" will yield integer 42.

Aside of standard set of events (mouse, keyboard, focus) behavior:radio generates:

"click" event - the button just changed its state to checked. Asynchronous event.
"change" | "input" event - checked state of the element changed due to user action.

true/false, reflects current status of :checked state flag.

Note: behavior:form treats all radio elements of the group as a single value equal to "value" attribute of checked element in the group.