Perform A Transform 

 var saxon = require('saxonXslt');

For a single transform or if the stylesheet is changing

try{
    var saxonProcessor = new saxon.SaxonProcessor(false);
    var xsltProcessor = saxonProcessor.newTransformer();
    var results = xsltProcessor.transformFileToString("./test/examples/xml/foo.xml", "./test/examples/xsl/baz.xsl");
    console.dir(results.toString());
    saxonProcessor.release();
}
catch (err) {
console.dir(err.message);
}

The stylesheet can be compiled from its file path before applying to an xml document

try{
    var saxonProcessor = new saxon.SaxonProcessor(false);
    var xsltProcessor = saxonProcessor.newTransformer();
    xsltProcessor.compileFromFile("./test/examples/xsl/baz.xsl");
    var results = xsltProcessor.transformFileToString("./test/examples/xml/foo.xml");
    console.dir(results.toString());
    saxonProcessor.release();
}
catch (err) {
console.dir(err.message);
}

or if the styesheet is hauled into memory first

    try{
        var xsltProcessor = saxonProcessor.newTransformer();
        var xslt = yield fs.readFile("./test/examples/xml/baz.xsl", "utf8");
        xsltProcessor.compileFromString(xslt);
        var results = xsltProcessor.transformFileToString("./test/examples/xml/foo.xml");
        console.dir(results.toString());
        saxonProcessor.release();
    }
    catch (err) {
    console.dir(err.message);
    }

    try{
        var saxonProcessor = new saxon.SaxonProcessor(false);
        var xsltProcessor = saxonProcessor.newTransformer();
        var xslt = yield fs.readFile("./test/examples/xml/baz.xsl", "utf8");
        xsltProcessor.compileFromString(xslt);
        xsltProcessor.parseXmlString(content);
        var results = xsltProcessor.transformToString();
        console.dir(results.toString());
        saxonProcessor.release();
    }
    catch (err) {
    console.dir(err.message);
    }