How do you inspect a react element’s props & state in the console?

Using React Developer Tools you can use $r to get a reference to the selected React Component.

The following screenshot shows you that I use React Developer Tools to select a component (Explorer) which has a state-object callednodeList. In the console I can now simply write $r.state.nodeList to reference this object in the state. Same works with the props (eg.: $r.props.path)