XML Parser

Guest · Post by **Guest** » Fri Oct 27, 2023 9:35 am

XML Parser

All major browsers have a built-in XML parser to access and manipulate XML.

XML Parser
The XML DOM (Document Object Model) defines the properties and methods for accessing
and editing XML.
However, before an XML document can be accessed, it must be
loaded into an XML DOM object.
All modern browsers have a built-in XML parser that can convert text into an XML DOM object.

Parsing a Text String
This example parses a text string into an XML DOM object, and
extracts the info from it with JavaScript:

Example

<html>
<body>
<p id="demo"></p>
<script>
var text, parser, xmlDoc;
text = "<bookstore><book>" +
"<title>Everyday Italian</title>" +
"<author>Giada De Laurentiis</author>" +
"<year>2005</year>" +
"</book></bookstore>";
parser = new DOMParser();
xmlDoc = parser.parseFromString(text,"text/xml");
document.getElementById("demo").innerHTML =
xmlDoc.getElementsByTagName("title")[0].childNodes[0].nodeValue;
</script></body></html>

Try it Yourself »

Example Explained
A text string is defined:

text = "<bookstore><book>" +
"<title>Everyday Italian</title>" +
"<author>Giada De Laurentiis</author>" +
"<year>2005</year>" +
"</book></bookstore>";

An XML DOM parser is created:

parser = new DOMParser();

The parser creates a new XML DOM object using the text string:

xmlDoc = parser.parseFromString(text,"text/xml");

The XMLHttpRequest Object
The XMLHttpRequest Object has a built in XML Parser.
The responseText property returns the response as a string.
The responseXML property returns the response as an XML DOM object.
If you want to use the response as an XML DOM object, you can use the responseXML
property.

Example
Request the file cd_catalog.xml and
use the response as an XML DOM object:

xmlDoc = xmlhttp.responseXML;
txt = "";
x = xmlDoc.getElementsByTagName("ARTIST");
for (i = 0; i < x.length; i++) {
txt += x.childNodes[0].nodeValue + "<br>";
}
document.getElementById("demo").innerHTML = txt;
Try it Yourself »

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Reference: https://www.w3schools.com/xml/xml_parser.asp