Standaloneinstaller.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “input” at this point.
Duplicate ID “navbarDropdownMenuLink”.
Element “figcaption” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Warnings:
Attribute “"” is not serializable as XML 1.0.
The first occurrence of ID “navbarDropdownMenuLink” was here.
The “main” role is unnecessary for element “main”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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