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Cascading Style Sheets CSS

Cascading Style Sheets CSS. CS422 Dick Steflik. CSS. CSS is a style sheet language that allows the seperation of content and the way it is formatted for documents written in some markup language HTML (Hypertext Markup Language) SVG ( Scaleable Vector Graphics)

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Cascading Style Sheets CSS

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  1. Cascading Style SheetsCSS CS422 Dick Steflik

  2. CSS • CSS is a style sheet language that allows the seperation of content and the way it is formatted for documents written in some markup language • HTML (Hypertext Markup Language) • SVG (Scaleable Vector Graphics) • X3D (3-Dimensional Graphics) • XUL (XML User Interface Language)

  3. Comment Characters • /* */

  4. elements/tags • selectors:attribute { rules } • selector is an element or an element:attribute • rule is the formatting you wish for that element • Example for HTML body and anchor tag body{ font-family: Arial,sans-serif; color: #333333; line-height: 1.166; margin: 0px; padding: 0px; } a:visited{ color: #006699; text-decoration: none; }

  5. divs • You can also specify formatting for specific parts of a document such as HTML divs #navBar{ float: left; width: 20%; margin: 0px; padding: 0px; background-color: #eeeeee; border-right: 1px solid #cccccc; border-bottom: 1px solid #cccccc; } where navBar is the id of a div in the document

  6. class • if an element has been assigned to a class the formatting will apply to that class .relatedLinks{ position: relative; margin: 0px; padding: 0px 0px 10px 10px; font-size: 90%; } .relatedLinks h3{ padding: 10px 0px 2px 0px; } .relatedLinks a:link, .relatedLinks a:visited { display: block; } where relatedLinks is a div assigned to the class relatedLinks

  7. positioning • Normal Flow – left to right top to bottom • Float – taken out of the normal flow and shifted to the left or right as far as possible • Absolute exactly where it is positioned and everything else flows around it • values : top, bottom, right, left

  8. cascading priority • (highest to lowest) • 1 – User Defined • 2 – Inline • 3 – Media type • 4 – Media Type • 5 – Selector specificity • 6 – Rule order • 7 – Parent inheritance • 8 – CSS property definition in HTML document • 9 – Browser default

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