Linksmanagement.com W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “customBtn”.
No “p” element in scope but a “p” end tag seen.
Start tag “a” seen but an element of the same type was already open.
Stray end tag “a”.
Bad value “130,15 190,50” for attribute “coords” on element “area”: A rectangle must have four comma-separated integers.
Bad value “200,15 240,50” for attribute “coords” on element “area”: A rectangle must have four comma-separated integers.
Element “area” is missing required attribute “alt”.
The “center” element is obsolete. Use CSS instead.
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “img” at this point.
Attribute “type” not allowed on element “textarea” at this point.
Warnings:
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “customBtn” was here.
Attribute “"” is not serializable as XML 1.0.
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