Make sure you validate your HTML and CSS, using a service like the W3C’s validator. This will warn you about obsolete tags and other errors that may make your HTML less robust.

General Assembly has launched a new online service that teaches basic web development for free, in your browser. It's called Dash, and it lets users learn how to use HTML, Javascript, and CSS by ...

The HTML for the page isn’t in this book because the miracle of CSS lets us change the presentation without having to change the HTML. When you create a style sheet for print, you actually use a ...

A CSS property named z-index determines the order in which divs appear when you stack one on top of another. By changing a div's z-index property, you can also change the div's order in the stack.

In CSS, you can create keyframes and use them for animations on different elements of your Web pages, including buttons. Keyframes consist of a single, reusable animation with properties set at ...