Function ambient_element::use_module_message_effect

pub fn use_module_message_effect<Enter: ModuleMessage + Default, Exit: ModuleMessage + Default>(
    hooks: &mut Hooks<'_>,
    target_id: Option<EntityId>
)

Send the Enter message when this Element is mounted, and the Exit message when it is unmounted.

If the target_id is Some, the message will be directed to that target; otherwise, it will be broadcast.