Thursday 18th of September 2014 03:38:02 AM

CSS Style Guide


This Style Guide explains the markup and design requirements for web projects, along with various standards and best practices.

projects authored in valid XHTML 1.0 Transitional and styled with valid Cascading Style Sheets will be described here. See the XHTML and CSS sections below for details. Additional sections of this Style Guide, coming soon, will provide information on writing for the web, naming and filing your documents, and other useful topics and guidelines.

XHTML: Guidelines & Benefits

Library projects must be authored in structural XHTML 1.0 Transitional. Page authors should follow accessibility guidelines in compliance with U.S. Law, and so that our site’s content will be made available to the widest possible number of people, browsers, and Internet devices. In addition, all XHTML must validate.

XHTML Guidelines
The rules of XHTML as compared to HTML—an easy transition
What is XML?
A brief introduction to the foundation of XHTML
XHTML Benefits
Four key benefits of converting from HTML to XHTML
XHTML Authoring Tips & Tools
Simplifying the work process—includes tips on thinking structurally, and tools for hand-coders and Dreamweaver users
XHTML Accessibility Tips
Making sure your pages can be read by all visitors, browsers, and devices
XHTML Validation
Ensuring interoperability by avoiding errors and sticking to standards

CSS: Style Sheets & Tips

P.tight {letter-spacing: -0.25em;}<P>The letters in this paragraph are spaced as normal.</P><P CLASS="spacious">The letters in this paragraph are spread out a bit.</P><P CLASS="tight">The letters in this paragraph are smooshed together a bit.</P>
Figure 4-50

Figure 4-50. Various kinds of letterspacing

One interesting use for letter-spacing is toincrease emphasis, which is a technique that was common in pastcenturies. Thus, you might declare the following to get an effectlike that shown in Figure 4-51:

Library projects must use valid Cascading Style Sheets (CSS) to control typography, color, and other layout elements. Style Sheets must be linked in a way that accommodates the capabilities of new and old browsers.

CSS Guidelines
Tips on authoring and linking to Style Sheets
Steal These Style Sheets!
Style Sheets for your use in Library projects
CSS Validation
Ensuring that your Style Sheets are error-free (same as XHTML validation)

A number of valid Style Sheets have been provided for your use. If you wish to create your own Style Sheets, please discuss your requirements with the Branch Library’s Web Coordinator.

link popularity
overflow: visible;}
Figure 9-8

Figure 9-8. Overflowing the content area of an element


The specification does not say whether or not visible overflowedcontent can overlap the content of other elements, but it isreasonable to infer that this is possible. Since positioned elementscan overlap other elements, it stands to reason that the content of apositioned element should be treated no differently.

A user agent has to do even more work if there are less than nine weights in a given font family. In this case, it has to fill in the gaps in a predetermined way: