...Virtual Scroll to support large trees. Checkboxes, Async children load. Expand/collapse/select nodes. Events: activate, collapse, expand, focus, etc. Custom node template (string or component) Custom loading component (for async data). Custom children/name attributes. API, very basic customizable CSS. Angular Tree Component comes with a default mapping of mouse events and key events to actions. For example - click on the node activates / deactivates it, click on the expander expands / collapses it, pressing space or enter will toggle the node activation (same as click), etc. ...