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HTML Checking for Large Sites

Rocket Validator integrates the W3C Validator HTML checker into an automated web crawler.

Attribute “ontouchstart” not allowed on element “div” at this point.

The ontouchstart attribute, used in devices with a touch screen, and not supported by all browsers, is not a valid attribute in the current HTML5 standard.

You can consider replacing it with the more generic onclick attribute, or still use it if you’re OK with its limitations.