Dialogflow.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “//fonts.googleapis.com/css?family=Roboto:300,400,400italic,500,500italic,700,700italic|Roboto+Mono:400,500,700|Material+Icons” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Attribute “search-placeholder” not allowed on element “form” at this point.
Attribute “track-type” not allowed on element “a” at this point.
Attribute “track-name” not allowed on element “a” at this point.
Attribute “track-metadata-position” not allowed on element “a” at this point.
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “cookie-policy” not allowed on element “a” at this point.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
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