Usage patterns for Weld

using welder.js

welder(things, 'things.html', 'thing', function(err, html) {
    if (err) throw new Error(err);

    res.send(html, {'Content-Type': 'text/html'});
});

welder.js

var jsdom = require('jsdom'),
    weld = require('weld');

module.exports = function(data, templateName, className, callback) {
    
    jsdom.env('templates/' + templateName, function(err, window) {
        if (err)
            return callback(err);

        var templateElement = window.document.getElementsByClassName(className)[0];

        if (!templateElement)
            return callback('Template element of class ' + className + ' not found.');

        weld.weld(templateElement, data);

        callback(null, window.document.outerHTML);
    });

}