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- <!DOCTYPE html>
- <!-- Any copyright is dedicated to the Public Domain.
- - http://creativecommons.org/publicdomain/zero/1.0/ -->
- <html>
- <body>
- <details open>
- <summary>outer summary</summary>
- <details open>
- <summary>inner summary</summary>
- <p>inner details</p>
- <details open>
- <summary>inner most summary</summary>
- <p>inner most details</p>
- </details>
- </details>
- <p>outer details</p>
- </details>
- </body>
- </html>
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