Top "W3c-validation" questions

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

Autocapitalize attribute on input element (used for iOS) breaks validation

As can be seen here, Safari and Safari for the iPhone support all HTML elements, including deprecated elements and even …

ios forms input w3c-validation
Clearing a floated <li> correctly

i dialy deal with float: left; and the CSS-reset by Eric Meyer with class="clearfix". But there is one special …

height css-float w3c-validation
"Bad value expires for attribute http-equiv on element meta"

Ok so I have been using the wrong code for I don't know how long now - it seems that &…

html meta w3c-validation http-equiv
Closing tag with ID property

Question: If I close any html tag in this fashion (Including the id property): <div id="tagid" >...more …

html closures w3c doctype w3c-validation
W3C validation error for input type=date

<input type="date" max="1995-12-31" class="form-control" id="dob"/> When I try to validate with W3C …

html w3c-validation
Why won't <iframe> elements validate in HTML 4.01?

I was just checking to see if it was valid to put an <iframe> element inside a <…

html iframe w3c-validation html4
Why do internal TABLE sections have to go THEAD TFOOT TBODY to validate?

I often use THEAD, TBODY, and TFOOT elements to divide my data tables into sections that can be addressed separately …

html validation xhtml w3c-validation
What DOCTYPE should I target today?

I'm refactoring a .Net web application that is in <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" &…

asp.net html asp.net-ajax doctype w3c-validation