QWeb2 How to use it, Sample codes

qweb2-tejastank-snippetbucket.js

        var engine = new QWeb2.Engine("templates.xml")
        engine.debug = true;
        
        var def = $.Deferred();
        engine.add_template('templates.xml', function(err) {
            if (err) {
                def.reject(err);
            } else {
                def.resolve();
                console.log(engine.render('login-box'));
            }
        });