The Dojo Mobile package provides a number of widgets that can be used to build web-based applications for mobile devices such as iPhone, Android, BlackBerry, or Windows Phone 8. These widgets work best with webkit-based browsers, such as Safari or Chrome, or with IE10, since CSS3 features are extensively used. However, the widgets should work in a “graceful degradation” manner even on non-CSS3 browsers, such as IE (before IE10) or (older) Firefox. In that case, fancy effects, such as animation, gradient color, or round corner rectangle, may not work, but you can still operate your application. Furthermore, as a separate file, a compatibility module, dojox/mobile/compat, is available, which simulates some of the CSS3 features used in this module. If you use the compatibility module, fancy visual effects work better even on non-CSS3 browsers.