Whether to dispatch a connect / disconnect DOM event on every node of an added or removed
subtree, for listeners added with addEventListener (default true). onConnect
callbacks run either way. Without the events, mounting or removing a large tree skips one
event dispatch per node, which otherwise dominates the observer's cost.
Whether to dispatch a
connect/disconnectDOM event on every node of an added or removed subtree, for listeners added withaddEventListener(default true). onConnect callbacks run either way. Without the events, mounting or removing a large tree skips one event dispatch per node, which otherwise dominates the observer's cost.