Page History

...

When the tapestry.enable-html5-support symbol is set to true (it is false by default), the Tapestry's built-in validators will automatically enable the HTML5-specific "type" and validation attributes to the rendered HTML of Tapestry's form components, triggering the HTML5 client-side validation behavior built into most modern browsers. For example, if you use the "email" and "required" validators, like this:

<t:textfield value="user.emailAddress" validate="email,required" .../>

then the output HTML will look like this:

...