how to uncheck a radio

[glfeng318]

<input type="radio" name="expand" _="on click halt the event remove [@checked] on me" class="ml-4">
not work as expected.
And how to toggle @checked attribute of a radio?

[Nicero]

Simply remove [ and ]:

_="on click remove @checked"

What behaviour should have a toggle radio button?

_="on click if me match <:checked/> ..."
_="on click if me match <:not(:checked)/> ..."