javascript

Chapter 15: XML in JavaScript
using JavaScript, it outputs the employee ’ s position first. This can be done in JavaScript using the
setStartMode() method as shown here:
processor.input = xmldom;
processor.addParameter(“message”, “Hello World!”);
processor.setStartMode(“title-first”);
processor.transform();
The setStartMode() method accepts only one argument, which is the mode to set the processor to. Just
as with addParameter() , this must be called before transform() .
If you are going to do multiple transformations using the same style sheet, you can reset the processor
after each transformation. When you call the reset() method, the input and output properties are
cleared, as well as the start mode and any specified parameters. The syntax for this method is as follows :
processor.reset();
//prepare for another use
Because the processor has compiled the XSLT style sheet, it is faster to make repeat transformations
versus using transformNode() .
MSXML supports only XSLT 1.0. Development on MSXML has stopped since
Microsoft ’ s focus has shifted to the .NET Framework. It is expected that, at some
point in the future, JavaScript will have access to the XML and XSLT .NET objects.
The XSLT Processor Type
Mozilla implemented JavaScript support for XSLT in Firefox by creating a new type. The
XSLTProcessor type allows developers to transform XML documents by using XSLT in a manner
similar to the XSL processor in IE. Since it was first implemented, Chrome, Safari (version 3 and later),
and Opera (version 9 and later) have copied the implementation, making XSLTProcessor into a de facto
standard for JavaScript - enabled XSLT transformations.
As with the IE implementation, the first step is load two DOM documents, one with the XML and the
other with the XSLT. After that, create a new XSLTProcessor and use the importStylesheet()
method to assign the XSLT to it, as shown in this example:
var processor = new XSLTProcessor()
processor.importStylesheet(xsltdom);
The last step is to perform the transformation. This can be done in two different ways. If you want to
return a complete DOM document as the result, call transformToDocument() . You can also get a
document fragment object as the result by calling transformToFragment() . Generally speaking, the only
reason to use transformToFragment() is if you intend to add the results to another DOM document.
When using transformToDocument() , just pass in the XML DOM and use the result as another
completely different DOM. Here’s an example:
var result = processor.transformToDocument(xmldom);
alert(serializeXml(result));
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