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A CSS hack is a coding technique used to hide or show CSS markup depending on the browser, version number, or capabilities. Browsers have different interpretations of CSS behavior and different levels of support for the W3C standards .
Each applies to the whole World Wide Web, not just a MediaWiki project (and does not depend on being logged in). However, a setting only affects other webpages if they use the same CSS selector; e.g. a setting for the selector a.extiw affects fewer pages on the web than one for h2 (but it affects at least all MediaWiki projects, not just one).
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 ...
You can use CSS to adjust the display, either via TemplateStyles or inline styles. For checkboxes and radio buttons, you can use the :checked pseudo selector. This can be very useful when combined with sibling css selectors (~) or :has() You can look for the class names calculator-value-true and calculator-value-false.
Keith Clark's Selectivizr is a popular polyfill that makes many CSS3 selectors work in IE 8 and below. It reads the page's stylesheets looking for a number of known CSS3 selectors, then uses a JavaScript selector library to query the document for elements matching those selectors, applying the styles directly to those elements.
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Code injection is a computer security exploit where a program fails to correctly process external data, such as user input, causing it to interpret the data as executable commands.
HTML5 cannot provide animation within web pages. Additional JavaScript or CSS3 is necessary for animating HTML elements. Animation is also possible using JavaScript and HTML 4 [123] [failed verification], and within SVG elements through SMIL, although browser support of the latter remains uneven as of 2011.