Posts related to the W3C HTML Working Group and the HTML 5 specification that is currently being worked on.

Make sure your HTML5 document outline is backwards compatible

When using the HTML5 sectioning elements, make sure the document outline created by the headings is backwards compatible.

Posted on May 2, 2012

End tags, semi-colons and maintainable code

Relying on browsers to magically insert missing code, like optional HTML tags or semi-colons and curly braces in JavaScript, is not developer-friendly.

Posted on April 17, 2012

The HTML5 placeholder attribute is not a substitute for the label element

The placeholder attribute is meant to give the user a nonessential hint before filling in a form field, not replace the label element.

Posted on April 9, 2012

Block level links and accessibility

HTML5 allows links to contain block level elements instead of just inline elements. This can be useful but there are currently potential usability issues with screen readers.

Posted on September 6, 2011

On using h1 for all heading levels in HTML5

The outline algorithm in HTML5 lets you use only h1 elements for all heading levels and still get a proper document outline. But browser and AT support is lacking, so use with care.

Posted on June 13, 2011

HTML5 has reached Last Call status – submit feedback until August 3

HTML5 and several closely related specifications have reached Last Call status, and the W3C has called for broad review of the documents.

Posted on May 30, 2011

HTML5 document outline revisited

My current thinking on document outlines in HTML5 and how and when to use the new sectioning elements, all with HTML4 compatibility in mind.

Posted on April 12, 2011

X-UA-Compatible and HTML5

If you for some reason have to use the non-standard X-UA-Compatible header to force standards mode in IE, be aware that it is invalid HTML5. Fortunately it is easy to fix.

Posted on March 31, 2011

HTML5 sectioning elements, headings, and document outlines

Getting the document outline you want is not as easy as you might think if you want to use the new sectioning elements in HTML5.

Posted on March 1, 2011

HTML5 Validator extension updates

The HTML5 Validator extension for Firefox has received a number of updates and is now hosted on GitHub.

Posted on February 26, 2011

Validating HTML5 with and the HTML5Validator Extension for Firefox

How to automatically validate HTML5 in Firefox by installing a local copy of and my HTML5 Validator Extension.

Posted on February 10, 2011

HTML beyond HTML5

The WHATWG announces that they will now work on a versionless version of HTML, making it a moving target that may make it less than ideal for web developers to reference in their daily work.

Posted on January 25, 2011

HTML5 logo FAQ updated to add clarification

The W3C HTML5 logo FAQ has been updated to clarify what the logo and its accompanying icons represent and that CSS3 is not part of HTML5.

Posted on January 21, 2011

HTML5 now includes CSS3, SVG and WOFF?

Having a nice-looking logo for HTML5 is neat, but I think it’s unfortunate that the W3C are reinforcing the widespread misconception that HTML5 is pretty much anything “Web” that isn’t Flash.

Posted on January 19, 2011

HTML5 allows almost any value for the id attribute – use wisely

HTML5 allows almost anything as the value for the id attribute. This opens up possibilites but can also lead to bugs and maintainability problems unless used wisely.

Posted on November 29, 2010

HTML5 syntax guidelines

A few guidelines that will help you produce understandable and maintainable HTML5. Executive summary: stick to the syntax rules of XHTML.

Posted on November 4, 2010

CSS3 is not HTML5

Many people mean a lot of things when they talk about HTML5. I think some related technologies are ok to bundle with HTML5, but not CSS.

Posted on August 23, 2010

No longdesc attribute in HTML5

The longdesc attribute, which can be used to provide a longer description of an image, is currently not included in the HTML5 specification.

Posted on August 20, 2010

Validating HTML5 in the browser

I’m looking for a browser extension that supports HTML5 and automatically validates the markup of every page I load in the browser without sending anything to a remote server.

Posted on June 3, 2010

Void (empty) elements and self-closing start tags in HTML

Two types of mistakes that I see every now and then are using end tags on void elements and using self-closing start tags on elements that can have content.

Posted on May 20, 2010

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