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HTML & CSS: The Good Parts

Cover of HTML & CSS: The Good Parts by Ben Henick Published by O'Reilly Media, Inc.
  1. HTML & CSS: The Good Parts
    1. SPECIAL OFFER: Upgrade this ebook with O’Reilly
    2. Preface
      1. The Who and What of This Book
      2. Objectives of This Book
      3. Conventions Used in This Book
      4. Using Code Examples
      5. Safari® Books Online
      6. How to Contact O’Reilly
      7. Acknowledgments
    3. 1. Hypertext at the Core
      1. The Web Without Links
      2. URIs
    4. 2. Working with HTML Markup
      1. HTML Syntax
      2. Rendering Modes, Flavors of HTML, and Document Type Declarations
      3. Beautiful Parts: Universal Attributes
      4. Separating Content, Structure, Presentation, and Behavior
      5. Browsers, Parsing, and Rendering
    5. 3. CSS Overview
      1. Connecting Stylesheets to HTML Documents
      2. Choosing the Elements You Want to Style: Writing Selectors
      3. Rule Conflicts, Priority, and Precedence
      4. CSS Property and Value Survey
      5. CSS Units
      6. Key CSS Layout Properties
    6. 4. Developing a Healthy Relationship with Standards
      1. The Broad Landscape of Web-Related Standards
      2. Why Web Standards?
      3. Taking the Middle Road: Standards-Friendliness
    7. 5. Effective Style and Structure
      1. The Four Habits of Effective Stylists
      2. CSS Zen and the Stylist’s Experience
      3. Information Architecture and Web Usability
    8. 6. Solving the Puzzle of CSS Layout
      1. The CSS Box Model and Element Size Control
      2. Quirks Mode and Strict Mode
      3. auto Values
      4. Margins, Borders, and Padding
      5. Element Flow
      6. Using the display Property to Change an Element’s Flow
      7. The float and clear Properties
      8. Implementing Multicolumn Layouts
      9. CSS Positioning Properties
      10. The visibility and z-index Properties
      11. Obtaining Precise Navigation Source Order and Layout
      12. Layout Types and Canvas Grids
    9. 7. Working with Lists
      1. Ordered and Unordered Lists
      2. Other Uses for Lists
      3. Styling Navigation Elements
      4. Definition Lists
    10. 8. Headings, Hyperlinks, Inline Elements, and Quotations
      1. Headings and Good Writing
      2. Styling Heading Elements
      3. Link Markup
      4. Styling Links
      5. Adding Semantic Value with Inline Elements
      6. Quotations
    11. 9. Colors and Backgrounds
      1. Color Theory and Web Color Practice
      2. CSS Backgrounds
      3. Composing Background Images
      4. Bitmapped Copy and Fahrner Image Replacement
      5. Reducing Server Load with Sprites
    12. 10. (Data) Tables
      1. The Disadvantages of Layout Tables
      2. The Parts of a Data Table
      3. Composing Cells
      4. Table Headers, Footers, and Heading Cells
    13. 11. Images and Multimedia
      1. Replaced Elements
      2. Preparing Images for Production
      3. Image Production
      4. Working with Color Profiles
      5. Image Optimization
      6. Publishing Images
      7. Styling Images and Plug-in Content
      8. Adding Motion and Sound: Using SWFObject to Insert Flash Videos and Presentations
      9. Inserting Unwrapped Multimedia
    14. 12. Web Typography
      1. A Brief History of Letterforms
      2. A Visual Glossary of Typography
      3. Aliasing and Anti-Aliasing
      4. Type Styles, Readability, and Legibility
      5. Sizing Type
      6. Working with Typefaces and Fonts
      7. Character Encoding in Brief
      8. Creating Balanced Type Treatments
      9. Typographical Miscellany in CSS
      10. The Practice of Good Web Typography
    15. 13. Clean and Accessible Forms
      1. Building Effective Forms
      2. Assessment and Structure
      3. Basic Form Structure, Presentation, and Behavior
      4. Prototyping and Layout
      5. Required Fields and Other Submission Constraints
      6. Creating Accessible Forms
      7. Form Features in HTML5
    16. 14. The Bad Parts
      1. The Numbing Nature of Internet Explorer (Especially IE 6)
      2. Systemic Ugliness
      3. HTML’s Bad Neighborhoods and Cul-de-Sacs
      4. CSS Travesties
      5. The Awful Parts
      6. Picking Up the Pieces
    17. A. URIs, Client-Server Architecture, and HTTP
      1. The Underlying Client-Server Architecture
      2. What Every Web Developer Should Know About HTTP
      3. MIME Types, in Brief
      4. Controlling Request Volume
    18. Glossary
    19. Index
    20. About the Author
    21. Colophon
    22. SPECIAL OFFER: Upgrade this ebook with O’Reilly

auto Values

The default value of both width and height is auto. When the browser applies the computed width of an element with this literal (if implied) value, that means an affected element will expand to fill the width of its container. For height, the affected element will only expand to fit the length of the content, but only if that element’s float value is none (the default).

However, when the border and/or padding values of an element with a width of auto are set, those values are subtracted from the computed width value of that element’s content, as are any relevant margin values that don’t collapse into the margins of other elements.

If you instead assign a discrete width value to a block element and change the values of its left and right margins to auto, that element will be centered within its container as pictured in Figure 6-2.

Centering a block of text, as margins are automatically set outside the border

Figure 6-2. Centering a block of text, as margins are automatically set outside the border


This section makes occasional references to “computed” width and height: the dimensions of an element after the user agent has rendered the page. This concept is also mentioned in Chapter 14.

The overflow Property

An element narrower than its container can be centered horizontally without regard to its specified or computed width, but this doesn’t work for element height. The literal height of an element and its container must both be known in advance, before ...

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