Most users will only want to use the innerText/innerHTML and outerText/outerHTML properties and methods discussed previously. However, there is some more advanced text manipulation that can be done using a "text range" object. The TextRange object can be used to: Locate the text for a given element or a given point.
Search for words and characters in the text of the document.
Move through the text in logical units.
Provide read/write access to the plain text and the HTMLText in the document.
This feature might not be available on non- Microsoft Win32 platforms. For the latest information on Microsoft Internet Explorer cross-platform compatibility, see article Q172976 in the Microsoft Knowledge Base.
This article consists of the following topics:
Overview of the TextRange Object
What Do I Do with a TextRange Object?
Positioning the TextRange Object
Creating a TextRange Object
Getting the Content of a TextRange
Comparing Ranges
Commands
Overview of the TextRange Object
Text range objects are an advanced feature of Dynamic HTML (DHTML) that you can use to carry out useful tasks related to dynamic content, such as searching for and selecting text. Text ranges let you selectively pick out characters, words, and sentences from a document. The TextRange object is an abstract object that creates a start and end position over the stream of text that would appear in the HTML document. Consider the following simple HTML document:
<HTML>
<BODY>
<H1>Welcome</H1>
<CENTER><H2>Overview<H2></CENTER>
<P>Be sure to <B>Refresh</B> this page.</P>
</BODY>
</HTML>
In this document, creating a text range over the body element would position the start at the beginning of the textual content of the body, and the end at the end of the textual content of the body. This text range would contain the plain text "Welcome Overview Be Sure to Refresh this page."
新闻热点
疑难解答
