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To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...
CSS 2, SVG and CSS 2.1 allow web authors to use system colors, which are color names whose values are taken from the operating system, picking the operating system's highlighted text color, or the background color for tooltip controls.
Also, values can be lists or expressions involving several of the aforementioned values. A typical value in a visual style sheet is a length; for example, "1.5em" which consists of a number (1.5) and a unit (em). The "em" value in CSS refers to the font size of the surrounding text. Common style sheet languages have around ten different units.
The W3C specifications SVG and CSS level 3 module Color eventually adopted the X11 list with some changes. [7] The present W3C list is a superset of the 16 "VGA colors" defined in HTML 3.2 and CSS level 1. One notable difference between X11 and W3C is the case of "Gray" and its variants.
Style may be chosen specifically for a piece of content, see e.g., color; scope of parameters Alternatively, style is specified for CSS selectors, expressed in terms of elements, classes, and ID's.
Sites that use CSS with either XHTML or HTML are easier to tweak so that they appear similar in different browsers (Chrome, Internet Explorer, Mozilla Firefox, Opera, Safari, etc.). Sites using CSS "degrade gracefully" in browsers unable to display graphical content, such as Lynx, or those so very old that they cannot use CSS. Browsers ignore ...
This script and CSS makes the sidebar stay in the same position on the screen as you scroll. This may have undesirable side effects in Chrome; e.g., when viewing a page like the very common.css page you just edited to put this code in, the viewable content will become much shorter, and require vertical scrolling in a frame.
A CSS reset is a different concept from a CSS framework. A reset style sheet is only used to reset basic formatting. A reset style sheet is only used to reset basic formatting. In contrast, a CSS framework, which typically include pre-made style definitions for often-needed UI elements or a grid system, is used to speed up the development ...