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HTML Guide

Free site validation

Find out what web pages on your sites are affected by HTML issues.

The “aria-labelledby” attribute must point to an element in the same document.

The aria-labelledby attribute establishes relationships between objects and their label(s), and its value should be one or more element IDs. It should reference an existing ID on the same document, but that id was not found.

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Related W3C validator issues