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New posts in w3c-validation

"Attribute aria-expanded not allowed on element li at this point"

html w3c-validation wai-aria

Microdata site name in search results: "Attribute itemprop not allowed on element link at this point."

html w3c-validation microdata

html 5 marquee tag error in w3c validation

html w3c-validation marquee

What makes a web site 'finished' for delivery to a client?

html w3c-validation

Wrong CSS validation error? Aptana studio vs W3-Validator

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W3 Failing with <noscript> nested in a DIV tag

html w3c-validation

Why is my script failing w3c validation?

javascript xhtml w3c-validation

HTML5 - 2017 right way to order <tbody> and <tfoot> elements?

html html-table w3c-validation

How to make a "simple" GET request if the resource doesn't allow CORS?

css cors w3c w3c-validation fetch-api

svg inline in HTML5 and svg custom attribute

html svg dtd w3c-validation custom-attribute

Website W3C validator shows "Mismatch between Public and System identifiers in the DOCTYPE declaration", what to do?

xhtml doctype w3c-validation rdfa

Can a css variable name start with a number?

css syntax w3c-validation css-variables

Using HTML tags in JavaScript strings while complying with W3C rules

javascript html w3c w3c-validation

How to make an img tag valid according to w3c with str_replace or some other php function? [closed]

php html regex w3c-validation

Why is /🌈 an invalid path when /a🌈 is valid?

html emoji w3c-validation url-parsing

<link rel="shortcut icon"> validation error despite being valid

html favicon w3c-validation

Possible to add line breaks in a textarea field while keeping it XHTML 1.0 valid?

xhtml w3c-validation line-breaks
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