var jade = require('jade');

options = {
    pretty: true
};

// Render an HTML fragment from a file written in Jade.
// Use callback to trap errors.
var htmlFrag = jade.renderFile('myFrag.jade', options, function (err, html) {
        if (err) {
           throw(err);
        }
        return html;
    });
    
console.log(htmlFrag);