Diamondregistry.com W3C HTML Markup Validation
HTML markup errors and warnings
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Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Errors:
Bad value “tel:+1 888-669-4747” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Bad value “tel:+852 2116-5311” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Bad value “” for attribute “name” on element “input”: Must not be empty.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Element “script” must not have attribute “defer” unless attribute “src” is also specified.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
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