- generic [active] [ref=e1]:
  - banner [ref=e2]:
    - heading "Infinite Scroll Gallery" [level=1] [ref=e3]
    - generic [ref=e4]:
      - generic [ref=e5]:
        - text: "Items loaded:"
        - strong [ref=e6]: "0"
      - generic [ref=e7]:
        - text: "Scroll position:"
        - strong [ref=e8]: "0"
        - text: px
      - generic [ref=e9]:
        - text: "Viewport:"
        - strong [ref=e10]: "669"
        - text: px
  - main [ref=e11]
  - paragraph [ref=e14]: Loading more items...