Kaskademusic.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.
The “form” role is unnecessary for element “form”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Element “img” is missing required attribute “src”.
Bad value “” for attribute “width” on element “iframe”: The empty string is not a valid non-negative integer.
Bad value “” for attribute “height” on element “iframe”: The empty string is not a valid non-negative integer.
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