Host

fn apply(&mut self, patches: &[Patch], tree: &[VNode])

Apply patches; tree is the complete new tree, for hosts that need to look at whole subtrees (e.g. to redraw a canvas).

fn report_error(&mut self, _error: &RenderError)

Called when a re-render fails (the previous tree stays in place).

fn attach(&mut self, _dispatch: Dispatcher)

Receives the dispatcher before the first render.