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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 ...
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.
Note: This method is a hack which does not work with all Wikipedia skins. For example, users of the Classic skin will have the links at the top of the page covered up by the title.
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.
The Cascading Style Sheets (CSS) specification describes how elements of web pages are displayed by graphical browsers. Section 4 of the CSS1 specification defines a "formatting model" that gives block-level elements—such as p and blockquote—a width and height, and three levels of boxes surrounding it: padding, borders, and margins. [4]
It appears that applying any CSS filter to html or body, even an empty one like body { filter: hue-rotate(); }, causes position:fixed elements such as the toast-type notification after submitting an edit or the top bar of the "timeless" skin to become unfixed and behave as if they were position:absolute.
CSS2 in May 1998 (later revised in CSS 2.1 and CSS 2.2) extended CSS1 with facilities for positioning and table layout. The preference for using HTML tables rather than CSS to control the layout of whole web pages was due to several reasons: the desire of content publishers to replicate their existing corporate design elements on their web site;
For example, due to the lack of the position: fixed parameter in CSS for elements such as top bars that should remain on screen when the user scrolls, JavaScript code had to be used to determine the user's scrolling position and then push down an element positioned with position: absolute by the same distance to have it remain on screen, [47 ...