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CSS Rule

CSS Rule. Selector. body { font-family: Tahoma, Arial, sans-serif; color: black; background: white; margin: 8px; }. Declaration Block. Value. Attribute Name. CSS Selectors. CSS. HTML. Tag name. h1 { color: red; }. <h1>Today’s Specials</h1>. Class attribute.

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CSS Rule

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  1. CSS Rule Selector body { font-family: Tahoma, Arial, sans-serif; color: black; background: white; margin: 8px; } DeclarationBlock Value Attribute Name CS 142 Lecture Notes: CSS

  2. CSS Selectors CSS HTML Tagname h1 { color: red;} <h1>Today’s Specials</h1> Classattribute .large { font-size: 16pt;} <p class="large">... Tag and class p.large {...} Idattribute #p20 { font-weight: bold; } <p id="p20">... table.itemstr.header CS 142 Lecture Notes: CSS

  3. R R G G B B CSS Color Specifiers • Predefined names: white black red … • 8-bit hexadecimal intensities for red, green, blue: • 0-255 decimal intensities: • Percentage intensities: #ff0000 rgb(255,255,0) R G B rgb(80%,80%,100%) CS 142 Lecture Notes: CSS

  4. CSS Element Boxes Parent’s background used in margin area Border Margin Padding Element Content Padding Element’s background used in padding area CS 142 Lecture Notes: CSS

  5. CSS Distances 2pxpixels 1mm millimeters 2cm centimeters 0.2in inches 3pt printer’s points 2em,4ex other printer’s units CS 142 Lecture Notes: CSS

  6. Adding Styles to HTML Separate Stylesheet <head> ... <link rel="stylesheet" type="text/css" href="myStyles.css" /> <style type="text/css"> body { font-family: Tahoma, Arial, sans-serif; ... } </style> </head> <body> ... <div style="padding:2px; ... "> ... </body> Page-Specific Styles Element-Specific Styles CS 142 Lecture Notes: CSS

  7. CSS: HTML: body { font-family: Tahoma, Arial, sans-serif; font-size: 13px; color: black; background: white; margin: 8px; } h1 { font-size: 19px; margin-top: 15px; margin-bottom: 5px; border-bottom: 1px solid black } .shaded { background: #d0d0ff; } <body> <h1>First Section Heading</h1> <p> Here is the first paragraph, containing text that really doesn't have any use or meaning; it just prattles on and on, with no end whatsoever, no point to make, really no purpose for existence at all. </p> <div class="shaded"> <h1>Another Section Heading</h1> <p> Another paragraph. </p> </div> </body> CS 142 Lecture Notes: CSS

  8. CS 140 Lecture Notes: File Systems

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