docs: next/head: Document error cases with head/body-tags; add subheadings #56412
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tordans
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leerob
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Which, I now realize, is something I debugged before for FixMyBerlin/trassenscout@daa28fd#diff-8e1ee4a53dc84447dceb573ab344784cf5674e1d50b1fbd6833320c6b6d7b856R17-R25. Side node: This will hopefully make this debugging easier in the future vercel/next.js#56412
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What?
Two things
<head>or<body>tags are allowed which will result in a very missleading error messageSee also Misleading "next-head-count is missing" error for invalid head tags #20924
Why?
The subheadings help with scannability of the page and give it structure.
The new section helps to understand how next/head is different from react-helmet (without referencing this explicitly). It helps to understand this very unrelated error message.