Css (1)
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The document discusses CSS (Cascading Style Sheets) and how it is used to style HTML documents. It explains that CSS rules can define styles that are applied to the entire page (body styles), element-specific styles, and class-based styles. It also covers CSS topics like specifying colors, element boxes, and different units for defining distances like pixels, ems, and points.
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[1] The document covers CSS fundamentals like selectors, specificity, the box model, and floating elements. It aims to demystify common CSS concepts.
[2] Specificity is explained, with ID selectors having the highest specificity followed by class selectors and element selectors. The last rule defined will override others with equal specificity.
[3] The box model is demonstrated, showing how padding, borders, and margins are added to element widths and heights. Margin collapse is also explained.Ad
Css (1)
- 1. CSS Rule Selector Declaration Block body { font-family: Tahoma, Arial, sans-serif; color: black; background: white; margin: 8px; } Value Attribute Name CS 142 Lecture Notes: CSS 際際滷 1
- 2. 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> Page-Specific Styles ... <div style=padding:2px; ... "> ... </body> Element-Specific Styles CS 142 Lecture Notes: CSS 際際滷 2
- 3. CSS: HTML: body { <body> font-family: Tahoma, Arial, sans-serif; <h1>First Section Heading</h1> font-size: 13px; <p> color: black; Here is the first paragraph, containing background: white; text that really doesn't have any use margin: 8px; or meaning; it just prattles on and on, } with no end whatsoever, no point to h1 { make, really no purpose for existence font-size: 19px; at all. margin-top: 15px; </p> margin-bottom: 5px; <div class="shaded"> border-bottom: 1px solid black <h1>Another Section Heading</h1> } <p> .shaded { Another paragraph. background: #d0d0ff; </p> } </div> </body> CS 142 Lecture Notes: CSS 際際滷 3
- 4. CSS Color Specifiers Predefined names: white black red 8-bit hexadecimal intensities for red, green, blue: #ff0000 R G B 0-255 decimal intensities: rgb(255,255,0) R G B Percentage intensities: rgb(80%,80%,100%) R G B CS 142 Lecture Notes: CSS 際際滷 4
- 5. CSS Element Boxes Parents background covers margin Border Margin Element Content Padding Padding Elements background covers padding CS 142 Lecture Notes: CSS 際際滷 5
- 6. CSS Distances 2px pixels 1mm millimeters 2cm centimeters 0.2in inches 3pt printers points 2em, 4ex other printers units CS 142 Lecture Notes: CSS 際際滷 6
- 7. CS 142 Lecture Notes: CSS 際際滷 7