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Chapter 5:
DOM Reference
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| bet | 103/131 | | Sana | 14.05.2024 | | Hajmi | 2,96 Mb. | | #232039 |
Bog'liq Ceponkus, Hoodbhoy - Applied XML - Toolkit for ProgrammersChapter 5:
DOM Reference
Overview
In the
preceding chapter
, we discussed why the DOM is used and from which
environments it can be used. We also talked briefly about of the various nodes present.
In this chapter, we drill down into the details of these various nodes. A description of
node properties and methods is presented, including sample code in JavaScript. A
scripting language is used in the examples because scripting languages are easier to
follow. Also, while most developers who write in C++ or Java are able to follow
JavaScript, the reverse isn’t necessarily true. The script examples are all HTML that run
under Internet Explorer 5, because, at the time of writing, Internet Explorer 5 was the only
browser that provided support for the DOM. This chapter should be read somewhat like a
reference, where a quick glance at the method descriptions and sample code reveals
most of the usage of the different DOM nodes.
The nodes that are most commonly used when working with the DOM are Document,
Element, and Attribute because they directly represent a construct found in an XML
document. Nodes that are essential, but that do not represent XML syntax constructs, are
Text, CDATASection, NodeList and NamedNodeMap. These seven nodes are presented
first, followed by the remaining nodes.
Appendix A
contains a concise reference of the methods and properties of each node.
At first, the plethora of methods and properties for each node type might seem a little
daunting. We’ve added sample code to the descriptions to illustrate the most commonly
used methods and properties. Some methods might seem redundant, and others might
seem plain old useless. On top of that, some methods that people would have liked to see
may have be omitted from the specification altogether. By and large, these inconsistencies
occurred because the W3C DOM committee is made up of industry players who
occasionally have conflicting perspectives for the use of the DOM. That being said, we’ve
included
all
the DOM methods and properties for the sake of thoroughness. As you read
through this chapter, keep in mind that the usage of some of these methods is open to your
own interpretation.
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