Node.js express-handlebars YAML Front Matter (YFM) example

hbs.js

'use strict';

var yfm = require('yfm');
var _ = require('underscore');
var exphbs = require('express-handlebars');
var hbs = exphbs.create({/* options */});

hbs._compileTemplate = function (template, options) {
	var results = yfm(template); //parse yfm
	var compiled = this.handlebars.compile(results.content, options); //compile without yfm
	compiled.yfm = results.context;
	return compiled;
};

hbs._precompileTemplate = function (template, options) {
	var results = yfm(template); //parse yfm
	var compiled = this.handlebars.precompile(results.content, options); //compile without yfm
	compiled.yfm = results.context;
	return compiled;
};

hbs._renderTemplate = function (template, context, options) {
	// merge yaml front matter into context
	context = _.extend(context, template.yfm);
	return template(context, options);
};

exports.handlebars = hbs;