HTML and CSS Reference
In-Depth Information
Here are the important points to remember from this chapter:
HTML code consists of markup elements, comments, and character
entities.
.
Markup elements provide the semantic information for user agents to
understand page content. CSS provides instructions for styling and pre-
senting the content.
.
he Document Object Model (DOM) provides a mapping between
HTML page elements and their content to data objects that can be
manipulated by client-side scripts written in JavaScript and other
languages.
.
Markup elements can have attributes. Attributes change how an element
looks or behaves without changing the semantic meaning of the ele-
ment's content.
.
here are two types of HTML markup elements—block elements, which
change content low, and inline elements, which do not. A block element
can be loated so that other content wraps around it.
.
he anchor and area elements create hyperlinks when given an
href
attribute with a URL value. Hyperlinks can have relative, root, or full
addressing.
.
Inline images are like big characters of text. Unless loated, they are
aligned with their adjacent content and participate in the content low.
.
HTML5 adds native support for
audio
and
video
content. he audio and
video elements provide fallbacks to other methods of media support for
older browsers.
.
he new HTML5
canvas
element gives web developers an interactive
drawing area in which image data can be manipulated with JavaScript.
.
