Operating system

Fedora 42 KDE

Eleventy

3.1.2

Describe the bug

Define an async shortcode:

eleventyConfig.addAsyncShortcode("testShortcodeAsync", async function () {
    return "Value from async shortcode";
});

Create a main test file main.njk:

<h2>Test2</h2>

{% set data = [1, 2, 3] %}
{% for item in data %}
    <p>Item {{ item }}</p>
    <p>{% include "./subpage.njk" %}</p>
    <hr/>
{% endfor %}

Create a subpage.njk file, that calls async shortcode:

Yay!

{% testShortcodeAsync %}

Expected result something like:

Item 1
Yay! Value from async shortcode
---
Item 2
Yay! Value from async shortcode
---
Item 3
Yay! Value from async shortcode
---

Actual result something like this:

Item 1

Item 2

Item 3

It seems to be quite broken. Not only isn't the subpage.njk content rendered, it breaks the whole loop iteration, as the <hr/> is also missing, that comes from the main.njk.

For the longest time I was thinking I just am not able to understand how the shortcodes work. Until I now dug in thoroughly to figure out what am I doing wrong - seems that I really stumbled on a nasty bug.

Reproduction Source Code URL

No response

Screenshots

No response