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HTML Guide

Free site validation

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

Bad value “” for attribute “imagesrcset” on element “link”: Must contain one or more image candidate strings.

For rel="preload" and as="image" only, the imagesrcset attribute is a sourceset attribute that indicates to preload the appropriate resource used by an img element with corresponding values for its srcset and sizes attributes.

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Related W3C validator issues