This is not to replace a checkbox, it’s to allow a radio group to go back to an unselected state. This was tricky because the radio selection doesn’t act like a normal event.
The browser handles radio buttons outside the normal event chain. So, a click handler on a radiobutton with event.preventDefault() or event.stopPropagation() will NOT prevent the radiobutton from being checked. The .removeAttr(‘checked’) must be done in a setTimeout to allow the event to finish, and the browser to check the radiobutton (again), and then the setTimeout will fire.
This also correctly handles the case where a user starts the mousedown but leaves the radiobutton before mouseup.
//$ = jQuery;
$(':radio').mousedown(function(e){
var $self = $(this);
if( $self.is(':checked') ){
var uncheck = function(){
setTimeout(function(){$self.removeAttr('checked');},0);
};
var unbind = function(){
$self.unbind('mouseup',up);
};
var up = function(){
uncheck();
unbind();
};
$self.bind('mouseup',up);
$self.one('mouseout', unbind);
}
});
I hope this helps