Chilkat Examples

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Node.js Examples

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(Node.js) XML Tree Traversal Order for Search* Methods

The Chilkat XML API provides a number of Search* methods for locating XML nodes based on criteria. These methods traverse an XML document in a breadth-first order. (See Breadth-First Search).

The XML document used in this example has the following tree structure:

The nodes are traversed in the order: A, B, C, D, E, F, G, H, I, J, K.

The input XML, available at http://www.chilkatsoft.com/data/searchOrder.xml, is this:

<a>crocodileA
    <b>crocodileB
        <d>crocodileD</d>
        <e>crocodileE
            <h>crocodileH</h>
            <i>crocodileI</i>
        </e>
    </b>
    <c>crocodileC
        <f>crocodileF</f>
        <g>crocodileG
            <j>crocodileJ</j>
            <k>crocodileK</k>
        </g>
    </c>
</a>

Install Chilkat for Node.js and Electron using npm at

Chilkat npm packages for Node.js

Chilkat npm packages for Electron

on Windows, Linux, MacOSX, and ARM

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node11-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node11-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node11-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node11-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node11-linux64');
    }
} else if (os.platform() == 'darwin') {
    var chilkat = require('@chilkat/ck-node11-macosx');
}

function chilkatExample() {

    var xml = new chilkat.Xml();
    // xBeginAfter: Xml
    var xBeginAfter;
    // xFound: Xml
    var xFound;

    var success;
    // The sample input XML is available at http://www.chilkatsoft.com/data/searchOrder.xml
    success = xml.LoadXmlFile("searchOrder.xml");
    if (success !== true) {
        console.log(xml.LastErrorText);
        return;
    }

    // IMPORTANT:  The following loop for iterating over all 
    // matching nodes performs reasonably well for small to 
    // mid-size XML documents or sub-trees.  Performance
    // can be poor when the sub-tree contains many thousands
    // of nodes (or more).

    // NOTE:  The search is always rooted at the calling node.
    // In this example, it happens to also be the root node of the entire
    // XML document.  Searches can be performed on sub-trees
    // within the document by calling the Search* method from
    // the root node of a sub-tree.

    // Demonstrate the breadth-first traversal:
    xBeginAfter = xml.GetSelf();
    xFound = xml.SearchAllForContent(xBeginAfter,"*croc*");
    while (!(xFound == null )) {

        console.log(xFound.Tag);

        xBeginAfter = xFound;
        xFound = xml.SearchAllForContent(xBeginAfter,"*croc*");
    }


}

chilkatExample();

 

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