Dev.Opera is the ultimate source of distilled knowledge for web developers, covering the latest open web technologies and techniques including HTML5, CSS3, JavaScript, SVG, optimizing content for mobiles, tablets and TVs, and creating add-ons such as extensions and themes for the Opera browser.
D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG and CSS. D3’s emphasis on web standards gives you the full capabilities of modern browsers without tying yourself to a proprietary framework, combining powerful visualization components and a data-driven approach to DOM manipulation.
This specification introduces features to HTML and the DOM that ease the authoring of Web-based applications. Additions include the context menus, a direct-mode graphics canvas, inline popup windows, server-sent events, and more.