Nand2tetris.org W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “100px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “a” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Attribute “"” is not serializable as XML 1.0.
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