Adding Disqus to Jekyll Site

After adding Google Analytics to the site, I’ve decided to add an ability to comment posts.

This is another standard task for Jekyll. I’ve selected Disqus as the commenting platform. If you are looking for alternatives, I recommend you to check implementation for comments providers from the jekyll-bootstrap project.

The implementation for Disqus is available in the standard minima theme. My implementation adds checks for required parameters and renders HTML warnings if commenting won’t be available.

The disqus.html include requires disqus.shortname variable in the _config.yml file. This is a shortname of the site you’ll get after registering your site in Disqus. I’ve added the include to the post.html layout along with comments: true variable in the layout’s header, so commenting is available for all blog posts by default. To disable comments on a particular post, I can specify comments: false value in the post’s YAML header.

The bits I’ve added to the post.html layout:

---
...
comments: true
---

<article class="post">
...

<br/>
{% include disqus.html %}
</article>

And here’s the code for the disqus.html include:

<!-- Disqus comments -->
{% if site.disqus.shortname %}
{% if jekyll.environment == "production" %}
{% if page.comments != false %}
<div id="disqus_thread"></div>
<script>
var disqus_config = function () {
this.page.url = "{{ site.url }}{{ page.url }}";
this.page.identifier = "{{ site.url }}{{ page.url }}";
};

(function() {
var d = document, s = d.createElement('script');
s.src = 'https://{{ site.disqus.shortname }}.disqus.com/embed.js';
s.setAttribute('data-timestamp', +new Date());
(d.head || d.body).appendChild(s);
})();
</script>
<noscript>Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript">comments powered by Disqus.</a></noscript>
{% else %}
<!-- Comments are disabled for this post. -->
{% endif %}
{% else %}
<!-- jekyll.environment variable is "{{ jekyll.environment }}" and not "production", Disqus snippet will be skipped. -->
{% endif %}

{% else %}
<!-- Please specify disqus.shortname variable in the _config.yml to enable Disqus comments -->
{% endif %}
<!-- End Disquss comments -->
Adding Google Analytics to Jekyll Site
Adding Previous and Next Post Navigation