Ed Tittel

Lists are powerful tools for grouping similar elements, and lists give visitors to your site an easy way to zoom in on groups of information. Just about anything fits in a list, from sets of instructions to collections of links. Definition lists group terms and definitions into a single list and require three elements to complete the list: : Holds the list definitions (dl = definition list) : Defines a term in the list (dt = definition term) : Defines a definition for a term (dd = definition list definition) You can have as many terms (defined by ) in a list () as you need.

Two big categories of strategies have been employed over the years to support web design for mobile devices: graceful degradation and progressive enhancement. Much of the web is currently nearly unusable on mobile devices because it was designed for desktop browsers and doesn't adapt well to small screens. Mobile web users are often forced to zoom, scroll, pinch, squint, and make their fingers as small as possible to use the majority of websites designed more than a couple years ago.

Hypertext Markup Language (HTML) and the Cascading Style Sheet (CSS) language are the lifeblood of web pages. Even experienced web designers and authors need help sometimes. This Cheat Sheet provides a quick color code guide, a table of HTML5 elements, and a table of CSS properties.Named colors and hex values in HTMLThe following table contains a list of named colors you can use in HTML and CSS code to create a more colorful website.

All web developers have essential sites they refer to over and over. Some resources are so good and so important that they make pretty much everyone's list, no matter what your skill level or how many years (or days?) of experience you may have. The following sites are some of the best of the best resources for any budding or experienced HTML5 developer.

HTML is called a markup language for a very good reason: It grabs ordinary, normal text and inserts various strings into that text to define, organize, and manage the flow and sequence of content on web pages. The inserted strings define the markup, which web browsers — or other special programs known as user agents — pore over and use (along with CSS, of course) to guide their display of the content included.

The following table contains a list of named colors you can use in HTML and CSS code to create a more colorful website. The colors are shown with their corresponding RGB hexcode values along with a representative color swatch. Name Hexcode Aqua #00FFFF Black #000000 Blue #0000FF Fuchsia #FF00FF

Web-page designers use images to deliver important information, direct site navigation, and contribute to overall look and feel on a web page. However, you have to use images properly, or you risk reducing their effectiveness. Use the height and width attributes with the element to let the browser know just how tall and wide an image is (the default unit is pixels, or px):

Appearing in alphabetical order is a list of all the HTML5 elements contained in the current HTML5 specification. A brief description is included as a quick reference when looking for the perfect element. Element Description A Use to create hyperlinks Abbr Use for abbreviations address Contact information Area Hyperlink in an image-map article* Provides section formatting for short expository items like articles, blogs, etc.

The following table shows CSS properties that are supported by most browsers today, along with their allowed values. Some of these properties are part of CSS3 specifications and are still experimental, so be sure to check with the Can I Use site for the latest information on browser support. (For help reading the Values column of this chart, see the article “A Quick Guide to the CSS Value Definition Syntax” at www.