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CSS has various levels and profiles. Each level of CSS builds upon the last, typically adding new features and typically denoted [43] as CSS 1, CSS 2, CSS 3, and CSS 4. Profiles are typically a subset of one or more levels of CSS built for a particular device or user interface.
Media queries is a feature of CSS 3 allowing content rendering to adapt to different conditions such as screen resolution (e.g. mobile and desktop screen size). It became a W3C recommended standard in June 2012, [ 1 ] and is a cornerstone technology of responsive web design (RWD).
Many HTML5 and CSS 3 features are already implemented in at least one major browser. [citation needed] Modernizr determines whether the user's browser has implemented a given feature.
[3] With the introduction of HTML5 and CSS 3, a new generation of browser wars began, this time adding extensive client-side scripting to the World Wide Web (WWW), and the more widespread use of smartphones and other mobile devices for browsing the web. These changes have ensured that browser battles continue among enthusiasts, while the ...
During development, the new CSS framework is initially written in personal CSS, then moved to a Development gadget, which anyone can enable to test the code. Templates will be converted in their respective sandboxes, calling upon the new CSS from the gadget. Once the CSS framework is finished, it can be moved to Common.css.
CSS image replacement is a Web design technique that uses Cascading Style Sheets to replace text on a Web page with an image containing that text. It is intended to keep the page accessible to users of screen readers, text-only web browsers, or other browsers where support for images or style sheets is either disabled or nonexistent, while allowing the image to differ between styles.
Bootstrap 3 features new plugin system with namespaced events. Bootstrap 3 dropped Internet Explorer 7 and Firefox 3.6 support, but there is an optional polyfill for these browsers. [13] Bootstrap 3 was also the first version released under the twbs organization on GitHub instead of the Twitter one. [14]
As of June 2011, Firefox 5 includes CSS animations support. [4] CSS animation is also available as a module in the nightly builds of WebKit as well as Google Chrome, Safari 4 and 5 and Safari for iOS (iPhone, iPod Touch, iPad), Android versions 2.x and 3.x, Internet Explorer 10+ and Microsoft Edge browser, the BlackBerry OS 6 web browser, with the -webkit-prefix.