Cubbles web inspector.
The cubbles-webinspector extension allows inspecting Cubbles components located within a webpage. The extension offers two main views:
First, a side panel within the Elements tab of the Chrome DevTool. The side panel is called Cubbles. When a Cubbles component is selected in the Elements DOM tree, a list of slots is presented within the Cubbles panel. Slots associated information such as type, value and description is displayed. Additionally, the value of a slot can be updated.
Second, a DevTool panel called Cubbles can be used to visualize the interface of all the root Cubbles components and the connections between them (if any). Additionally, the root dependencies tress can be visualized too.
Since this is a DevTools extension, the desired webpage or Cubbles component should be inspected (https://developers.google.com/web/tools/chrome-devtools/).