View Engine
To make it easy to use Handlebars templates in ExpressJS we configure Handlebars as a view engine in ExpressJS. Using the express-handlebars module.
Configure it like this :
app.engine('handlebars', exphbs({defaultLayout: 'main'}));
app.set('view engine', 'handlebars');
Then use it like this:
var data_for_template = {};
res.render('template_name', data_for_template);