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XML E4X

E4X JavaScript to add direct support for XML.

E4X Examples

var employees=
<employees>
<person>
<name>Tove</name>
<age>32</age>
</person>
<person>
<name>Jani</name>
<age>26</age>
</person>
</employees>;

document.write(employees.person.(name == "Tove").age);

This example applies only to Firefox!

try it"


XML As a JavaScript object

E4X is an official JavaScript standard, adds direct support for XML.

Using E4X, you can declare Date or by way of Array object variable declaration XML object variable:

var x = new XML()

var y = new Date()

var z = new Array()

E4X is an ECMAScript (JavaScript) standard

ECMAScript is the official name of JavaScript. ECMA-262 (JavaScript 1.3) was standardized in December 1999.

E4X is a JavaScript extension adds direct support for XML. ECMA-357 (E4X) in June 2004 standardized.

ECMA organization (founded in 1961), is dedicated to information and communication technologies (ICT) and consumer electronics (CE) standardization. ECMA standard established for:

  • JavaScript
  • C # language
  • International character sets
  • CD
  • Magnetic tape
  • data compression
  • data communication
  • and many more...

Do not use E4X

The following example is a cross-browser instance, the instance to load an existing XML document ( "note.xml") into the XML parser, and displays a message Description:

Examples

var xmlDoc;
//code for Internet Explorer
if (window.ActiveXObject)
{
xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
xmlDoc.async=false;
xmlDoc.load("note.xml");
displaymessage();
}
// code for Mozilla, Firefox, etc.
else (document.implementation && document.implementation.createDocument)
{
xmlDoc= document.implementation.createDocument("","",null);
xmlDoc.load("note.xml");
xmlDoc.onload=displaymessage;
}

function displaymessage()
{
document.write(xmlDoc.getElementsByTagName("body")[0].firstChild.nodeValue);
}

try it"

Using E4X

The following example is the same as the example above, but using E4X:

var xmlDoc=new XML();
xmlDoc.load("note.xml");
document.write(xmlDoc.body);

More simple, is not it?

Browser Support

Firefox is the only E4X support a better browser.

There is no support E4X areOpera, ChromeorSafari.

So far, there is no indication E4X support inInternet Explorer.

E4X future

E4X is not widely supported. Maybe too practical features it offers, has not been involved in other solutions:

  • For the complete XML processing, you also need to learn XML DOM and XPath
  • For access XMLHttpRequests, the JSON is the preferred format.
  • For simple document processing, JQuery choice easier.