adding

example/views/helpers/meta.njk

@@ -25,5 +25,6 @@
             <link href="{{ http }}://{{ site.domain }}{{ page.path }}" rel="canonical">
             <link rel="alternate" href="{{ http }}://{{ site.domain }}{{ page.path }}" hreflang="{{ site.language }}">
         {% endif %}
+        
     {% endif %}
 {% endmacro %}

example/views/home.njk

@@ -2,7 +2,7 @@
 
 {% block main %}
 
-<img src="{{ page.media.teaser.src | resize({ width: 100 }) }}" />
+<img src="{{ page.fields.media.teaser.src | resize({ width: 100 }) }}" />
 {{ page.content | safe }}
 
 {% endblock %}

example/views/post.njk

@@ -1,5 +0,0 @@
-{% extends('layout.njk') %}
-
-{% block main %}
-{{ page.content | safe }}
-{% endblock %}

src/engines/nunjucks.js

@@ -1,6 +1,7 @@
 const nunjucks = require('nunjucks')
 const { minify } = require('html-minifier')
 const fs = require('fs')
+const assign = require('assign-deep')
 
 const configStore = require('./../config.js')
 const { asset, resize } = require('./helpers.js')
@@ -17,10 +18,18 @@ const PageQuery = require('./../queries/pages.js')
  */
 class Engine {
 
+    /**
+     *
+     *
+     *  @param {string} views
+     *  @param {object} site
+     *  @param {object} options
+     *
+     */
     constructor(views, site, options) {
 
-        // merge options
+        // merge data
-        this._options = Object.assign({}, {
+        this._options = assign({}, {
             autoescapes: true,
             throwOnUndefined: true,
             web: {
@@ -29,6 +38,8 @@ class Engine {
         }, options)
 
         this.nunjucks = nunjucks.configure(views, this._options)
+
+        // add filter: resize
         this.nunjucks.addFilter('resize', (...args) => {
             const done = args.pop()
             const options = args?.[2] ? {} : args[2]
@@ -36,7 +47,7 @@ class Engine {
             resize(args[0], args[1], options, done)
         }, true)
 
-        // adding defaults for view, function and data = config.yml
+        // adding defaults for view, data from site.yml, functions and pageQuery
         this._defaults = {
             site: site,
             asset: asset,
@@ -53,12 +64,15 @@ class Engine {
      *
      */
     render(view, data, done) {
-        data = Object.assign({}, data, this._defaults)
+
+        // merge data
+        data = assign({}, data, this._defaults)
 
         this.nunjucks.render(view, data, (error, response) => {
 
             const options = configStore.get('options')
 
+            // if options minifyHtml is set, minify html
             if (options.minifyHtml === true) {
                 response = minify(response, {
                     removeComments: true,