override block in post using nunjucks

[btrem]

If I have a block defined in a layout using nunjucks, can I override it in a post? If this is my layout:

<!-- other markup -->
{% block content %}
    <main>
        {{ content | safe }}
    </main>
{% endblock %}

In mypost.njk, can I do this?

---
title: my post
---
{% block content %}
    <main class="specialClassForMyPost">
        <p>This is my post.</p>
    </main>
{% endblock %}

So in other words change the main element on a one off basis. That gives me duplicate <main> tags, which means either it can't be done or I'm doing it wrong.

[Ryuno-Ki]

Sounds like a use case for {% extends %} to me 🤔

[pdehaan]

@btrem Do you have a public repo somewhere? I might be able to take a look.

#853 might also have some good pointers and links to examples in repos.

[btrem]

Sorry, of course I messed up my initial question. I edited it to make it clear what I'm hoping to achieve.

@Ryuno-Ki So it sounds like I can't override a block in a a post as I demonstrated in the edited initial post. Instead, I'd need to create a new layout, say, my-new-layout.njk:

{% extends 'base.njk' %}
{% block content %}
    <main class="specialClassForMyPost">
        {{ content | safe }}
    </main>
{% endblock %}

and then in my-post.njk (or my-post.md or whatever):

---
title: my post
layout: my-new-layout.njk
---

<main class="specialClassForMyPost">
    <p>This is my post.</p>
</main>

[btrem]

@pdehaan Thanks for the link to the github thread. It confirms what I thought -- and provides some interesting reading -- which is not a big deal. I can create a layout that extends my base layout.