Feedback is much appreciated; especially around security, since D4pi takes arbitrary user input text, sanitizes it (by removing & < > " '), transforms it, and then renders it as HTML. I will be very happy to learn about anything I missed or some other way to do it better.

Thank you.

Source code: https://github.com/d4pi/d4pi.github.io

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Edit: This may be more interesting to D4 players:

The D4pi item editor lets you to enter item attributes with few keystrokes; for example, all the following entries are recognized and rendered as

  +2.5% Critical Strike Chance

  +2.5% CSC
  2.5% CSC
  2.5 CSC
  2.5CSC
  2.5csc