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New posts in w3c-validation

Does HTML5 require an action attribute for forms? [duplicate]

forms html w3c-validation

Is it valid to put h3 (or any heading) inside td tags?

html html-table w3c-validation html-heading

W3C don't validate Viewport

html w3c w3c-validation

Using aria-sort in validated HTML5

html accessibility w3c-validation wai-aria

HTML validation error: Non-space characters found before DOCTYPE

html wordpress utf-8 w3c-validation byte-order-mark

Microdata itemprop causes W3C validator error

w3c-validation microdata xhtml-1.0-strict

W3C validation for <ui-select>

html angularjs w3c-validation ui-select

HTML standards for input names on complex forms

html forms w3c-validation web-standards

X/Html Validator in PHP

php html validation xhtml w3c-validation

Can a <figure> element contain only a <figcaption> without an image?

html semantic-web w3c-validation semantic-markup figure

is -negative margin or padding invalid CSS according to W3C?

css w3c w3c-validation

How to make a sitemap link in the page head pass the W3C validator?

html sitemap w3c-validation html-head

Are unquoted data URIs valid in CSS?

css w3c-validation data-uri

w3c compliance - html 5 - "Error: The document content type is not HTML : undefined"

html w3c-validation

W3C validation error for input type=date

html w3c-validation

W3C Validation and Vue's HTML binding syntax

html vue.js w3c-validation

CSS3 calc() validation: Value Error : width Parse Error [duplicate]

css w3c-validation css-calc

CSS Error: Expected ':' but found '/'. Declaration dropped. Line: 0

html css firefox w3c w3c-validation

XHTML Strict: br tag inside p tag

html css w3c-validation
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