Empty array of navPages

[kalininmax]

Browser:

I'm newbie. I used this guide.

In my md files I used front matter keys like this:

---
title: 11ty starter site
description: This is a demonstration website generated using the 11ty static site generator.
layout: base.njk
eleventyNavigation:
	key: home
	order: 100
---

---
title: About us
description: What we do.
eleventyNavigation:
	key: about
	order: 200
---

---
title: Privacy policy
description: We keep your details private.
eleventyNavigation:
	key: privacy
	parent: about
	order: 220
---

---
title: Our team
description: Information about us.
eleventyNavigation:
	key: team
	parent: about
	order: 210
---

But it return empty array (screenshots above):

{% set navPages = collections.all | eleventyNavigation %}
{{ navPages | dump | safe }}  

What's problem with eleventy navigation in my project?
Repository: https://github.com/kalininmax/11ty

[pdehaan]

Instead of using tabs in your frontmatter, try using 2 spaces:

[
  {
    "key": "home",
    "order": 100,
    "url": "/",
    "pluginType": "eleventy-navigation",
    "title": "home",
    "children": []
  },
  {
    "key": "about",
    "order": 200,
    "url": "/about/",
    "pluginType": "eleventy-navigation",
    "title": "about",
    "children": [
      {
        "key": "team",
        "parent": "about",
        "order": 210,
        "url": "/about/team/",
        "pluginType": "eleventy-navigation",
        "parentKey": "about",
        "title": "team",
        "children": []
      },
      {
        "key": "privacy",
        "parent": "about",
        "order": 220,
        "url": "/about/privacy/",
        "pluginType": "eleventy-navigation",
        "parentKey": "about",
        "title": "privacy",
        "children": []
      }
    ]
  }
]

[kalininmax]

@pdehaan thank you so much.
Actually, just now, I found this answer in Eleventy Walk Through guide. But anyway thank you for your time.

[GRUBES]

FWIW it looks like this occurs because of this condition. If you do not provide a specific key to eleventyNavigation, then the pages in the collection you pass cannot have a parent. Not sure whether that is intentional, but it was unexpected to me.