Document short-circuit truthiness #154
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With `c and h.div["hi"]`, mypy must assume the result is either the left operand (C | None) or the right operand (Element). Because C.__bool__ has no declared return type, mypy can’t narrow based on truthiness and keeps the union as C | None | Element, which doesn’t fit Node | None.
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Discussed with Pelme. A short note in https://htpy.dev/usage/#conditional-rendering would be more appropiate. |
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I'd like to document an alternative to an antipattern that I found several times and had to refactor. It'd be nice to have a section to point to :).