Thursday 05th of May 2016 04:10:36 PM

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

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
has been done in Figure 7-69.

Figure 7-69

Figure 7-69. More floating images and element backgrounds

Yes, the figure is correct: the content of the H3flows past the image, and the background "slides under"the image, so to speak. This is, in its way, no different than theexample in which the paragraph that contained the floated image had avisible background.

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.

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italic or otherwise slanted." The vast majority of text in this book is upright, for instance.

That leaves only an explanation of the difference between italic and oblique text. For that, it's easiest to turn to Figure 5-24, which illustrates the differences very clearly. an element by preventing it from being above the top of a linecontaining content that precedes the floated element. Let's saythat, right in the middle of a paragraph, there is a floated image.The highest the top of that image may be placed is the top of theline box from which the image originates. As you can see in Figure 8-35, this keeps images from floating too farupward.

Figure 8-35

Figure 8-35. Keeping floats level with their context

7. A left (or right) floating element that has anotherfloating element to its left (or right) may not have its right outerforeground, out to the edge of the borders; thus, the content box andthe padding are all part of an element's background. There aretwo ways to set the background color: thebackground-color and backgroundproperties.

6.1.1. Foreground Colors

Theeasiest way to set the foreground color of an element is with the the border's width was set to be 20px , when the style is set to none, not only does the border's style go away, so does its width! Why?

If you'll remember, the terminology used in the previous section was that a border with a style of none does not exist. Those words were picked carefully because they help explain what's going on here. Since the border doesn't exist, it can't have any width, so the width is automatically set to 0 (zero). This may seem completely