Detecting and Testing HTML 5 Support

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Detecting HTML 5 is as easy as 1-2-3

To test support for HTML 5 and display different messages based on whether HTML 5 support is available, try this:

Create a sample web page. Include a paragraph with a message indicating that HTML 5 is not supported. In the starting <p> tag, include a class attribute with "nohtml". See the example below.
Create a style sheet with a template to suppress any HTML tags that have the class="nohtml" attribute. See the style sheet included with the example.
Include a xml-stylesheet instruction that references the style sheet.

Example of Detecting HTML 5 Support

test detection of HTML 5

Valid HTML 5