Top "W3c-validation" questions

You can use W3C validation services to check HTML documents, CSS stylesheets, Atom/RSS feeds, and more.

Can self closing <link> tags be problematic?

I read that self closing tags were problematic for some browsers such as IE7 and Firefox 3 here: Why don't self-closing …

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Can I use non existing CSS classes?

I have a table where I show/hide a full column by jQuery via a CSS class that doesn't exist: &…

html css w3c-validation web-standards
Should I care about W3C validation?

I'm learning AngularJS and I found a simple code like this one: <!DOCTYPE html> <html> <…

angularjs validation w3c-validation
How to make a sitemap link in the page head pass the W3C validator?

I'm trying to pass a page through the W3C Validator. The validation fails on the sitemap, which I'm including …

html sitemap w3c-validation html-head
Is it necessary to have <tbody> in every table?

Is it necessary to have <tbody> in every table? According to Standards.

xhtml w3c semantic-markup w3c-validation
Why does http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" is not validated in W3C Validator?

I have: <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" /> On validation in http://validator.w3.org/ I get …

html internet-explorer w3c-validation x-ua-compatible
Microdata itemprop causes W3C validator error

After adding Microdata to my pages, I got many errors from W3C validator complaining the itemprop: there is no …

w3c-validation microdata xhtml-1.0-strict
W3C validator, CSS3 and Bootstrap

I have a site that uses the Twitter Bootstrap framework which renders without errors in all browsers. However, when I …

css twitter-bootstrap w3c-validation
html 5 marquee tag error in w3c validation

I have some text in marquee tag. <marquee direction="left" scrollamount="4"> Test Test Test Test Test </marquee&…

html w3c-validation marquee
HTML validation error: Non-space characters found before DOCTYPE

I have a blog(wordpress based). And try to validate by w3c validator one of my page. The first …

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