Web Runtime (WRT) for the S60 platform provides support for Web widgets. Web widgets are small applications that can access the wealth of Web-based information and services. WRT was created by extending the powerful core of the Web Browser for S60. This open-source engine allows WRT developers to use familiar industry standards such as HTML, Cascading Style Sheets (CSS), and Asynchronous JavaScriptTM and XML (AJAX) to build small stand-alone Web applications called widgets.
Widget's operations are mainly implemented using the JavaScript scripting language. The WRT environment supports JavaScript APIs that conform to the ECMA-262 specification third edition. It also supports the JavaScript DOM (Document Object Model) and XMLHttpRequest objects. In addition to the standard JavaScript objects, WRT provides widget-specific extension APIs for widgets to access certain system properties and mobile environment.