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102

EXTENDING DREAMWEAVER CS4

The Dreamweaver Document Object Model

Properties and methods of text objects

Each contiguous block of text in an HTML document (for example, the text within a p tag) is represented by a

JavaScript object. Text objects never have children. The following table describes the properties and methods of text

objects that are taken from DOM Level 1 and used in Dreamweaver. A bullet (•) marks read-only properties.

Properties and methods of comment objects

A JavaScript object represents each HTML comment. The following table details the properties and methods of

comment objects that are taken from DOM Level 1 and are used in Dreamweaver. A bullet (•) marks read-only

properties.

getElementsByAttributeName(attrName) A NodeList that can be used to step through elements with an attribute

attrName (for example, all elements with the attribute "for"). Not part of

DOM Level 1 or 2.

hasChildNodes() A Boolean value that indicates whether the tag has any children.

hasTranslatedAttributes() A Boolean value that indicates whether the tag has any translated attributes.

(This property is not included in DOM Level 1; it was added to Dreamweaver

3 to support attribute translation.)

Property or method Return value

nodeType • Node.TEXT_NODE

parentNode • The parent tag

child Nodes • An empty

previousSibling • The sibling node immediately prior to this one. For example, in the code blah<br

/>blah

, the tag has three child nodes (text node, element node, text node). The

previousSibling of the third child is the tag; the previousSibling of the first

child is

null.

nextSibling • The sibling node immediately following this one. For example, in the code blah<br

/>blah

, the nextSibling of the first child of the p tag is the tag; the

nextSibling of the third child is null.

data The actual text string. Entities in the text are represented as a single character (for example,

the text

Joseph & I is returned as Joseph & I).

hasChildNodes() false

Property or method Return value

nodeType • Node.COMMENT_NODE

parentNode • The parent tag

childNodes • An empty NodeList array

previousSibling • The sibling node immediately prior to this one.

nextSibling • The sibling node immediately following this one.

data The text string between the comment markers ()

hasChildNodes() false

Property or method Return value

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Adobe Extending Dreamweaver CS4 Manuale Utente Pagina 108

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