Testing character encoding: empty declaration

The <meta charset> element is present in <head>, but its value is empty. Distinct from the missing-declaration case, the element exists, it's just invalid, and browsers may or may not treat that the same as the element being absent entirely.

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Expected result: an empty value is invalid, so this likely falls back to the same heuristic detection as the missing-declaration page, worth confirming that directly rather than assuming, and comparing the two pages side by side for any difference in how the characters above render or are announced.

HTML markup

<head>
  <meta charset="">
  ...
</head>