Who.int W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
CSS: “align-self”: “l” is not a “align-self” value.
Element “img” is missing required attribute “src”.
Any “input” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.
Bad value “searchSubmit ” for attribute “id” on element “button”: An ID must not contain whitespace.
The “main” element must not appear as a descendant of the “article” element.
The “main” element must not appear as a descendant of the “section” element.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The value of the “for” attribute of the “label” element must be the ID of a non-hidden form control.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
The “navigation” role is unnecessary for element “nav”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “link” role is unnecessary for element “a”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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