pub trait DOMHTMLCanvasElementExt: 'static {
fn height(&self) -> c_long;
fn width(&self) -> c_long;
fn set_height(&self, value: c_long);
fn set_width(&self, value: c_long);
fn connect_height_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
fn connect_width_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
}