You can think of these Jekyll helpers as little shortcuts. Since GitHub Pages doesn't allow most plugins --- [custom tags](https://jekyllrb.com/docs/plugins/#tags) are out. Instead the theme leverages [**includes**](https://jekyllrb.com/docs/templates/#includes) to do something similar.
{% raw %}{% include figure image_path="/assets/images/unsplash-image-10.jpg" alt="this is a placeholder image" caption="This is a figure caption." %}{% endraw %}
```
Will output the following:
{% include figure image_path="/assets/images/unsplash-image-10.jpg" alt="this is a placeholder image" caption="This is a figure caption." %}
```html
<figure>
<imgsrc="/assets/images/unsplash-image-10.jpg"alt="this is a placeholder image">
<figcaption>This is a figure caption.</figcaption>
| **id** | Optional | To add multiple galleries to a document uniquely name them in the YAML Front Matter and reference in `{% raw %}{% include gallery id="gallery_id" %}{% endraw %}` | `gallery` |
| **layout** | Optional | Layout type. 2 column: `half`, 3 column: `third`, single column: `''` (blank) | Determined by gallery size. Two items: `half`, three or more items: `third`. |
| **class** | Optional | Use to add a `class` attribute to the surrounding `<figure>` element for additional styling needs. | |
**More Gallery Goodness:** A few more examples and [source code](https://github.com/{{ site.repository }}/blob/master/docs/\_posts/2010-09-09-post-gallery.md) can be seen in [this sample gallery post]({{ "" | relative_url }}{% post_url 2010-09-09-post-gallery %}).
Designed to compliment the [`splash`]({{ "/docs/layouts/#splash-page-layout" | relative_url }}) page layout as a way of arranging and aligning "feature blocks" containing text or image.
| **id** | Optional | To add multiple rows to a document uniquely name them in the YAML Front Matter and reference in `{% raw %}{% include feature_row id="row2" %}{% endraw %}` | `feature_row` |
| **type** | Optional | Alignment of the featured blocks in the row. Options include: `left`, `center`, or `right` aligned. | |
**More Feature Row Goodness:** A [few more examples]({{ "/splash-page/" | relative_url }}) and [source code](https://github.com/{{ site.repository }}/blob/master/docs/\_pages/splash-page.md) can be seen in the demo site.
Embed a video from YouTube, Vimeo, or Google Drive that responsively sizes to fit the width of its parent. To help with GDPR compliance, the theme is using the privacy enhanced version of YouTube and Vimeo providers out of the box.
To embed the following YouTube video at url `https://www.youtube.com/watch?v=XsxDH4HcOWA` (long version) or `https://youtu.be/XsxDH4HcOWA` (short version) into a post or page's main content you'd use:
To embed the following Google Drive video at url `https://drive.google.com/file/d/1u41lIbMLbV53PvMbyYc9HzvBug5lNWaO/preview` into a post or page's main content you'd use:
```liquid
{% raw %}{% include video id="1u41lIbMLbV53PvMbyYc9HzvBug5lNWaO" provider="google-drive" %}{% endraw %}
```
{% include video id="1u41lIbMLbV53PvMbyYc9HzvBug5lNWaO" provider="google-drive" %}
To embed it as a video header you'd use the following YAML Front Matter
| **toc** | Optional | Show table of contents. (boolean) | `false` |
| **toc_label** | Optional | Table of contents title. (string) | `toc_label` in UI Text data file. |
| **toc_icon** | Optional | Table of contents icon, displays before the title. (string) | [Font Awesome](https://fontawesome.com/icons?d=gallery&s=solid&m=free) <iclass="fas fa-file-alt"></i>**file-alt** icon. Other FA icons can be used instead. |
| **toc_sticky** | Optional | Stick table of contents to top of screen. | `false` |
**Note:** using both methods will have unintended results. Be sure to remove `{% raw %}{% include toc %}{% endraw %}` placed table of contents from your content when using `toc: true`.
{: .notice--warning }
### Enabled via `toc` include (deprecated)
To include a Kramdown [auto-generated table of contents](https://kramdown.gettalong.org/converter/html.html#toc) for posts and pages, add the following helper to your content.
**Note:** this method only works with Markdown files.
{: .notice--warning}
**Deprecated:** `toc` helper will be removed in the next major version of the theme. It is encouraged that you migrate to the YAML Front Matter method above.
| **title** | Optional | Table of contents title. (string) | `toc_label` in UI Text data file. |
| **icon** | Optional | Table of contents icon, displays before the title. (string) | [Font Awesome](https://fontawesome.com/icons?d=gallery&s=solid&m=free) <iclass="fas fa-file-alt"></i>**file-alt** icon. Other FA icons can be used instead. |
**1.** Start by adding a set of titles and URLs to `_data/navigation.yml` in the same way the [`main` navigation]({{ "/docs/navigation/" | relative_url }}) is built.
For a navigation list that has child pages you'd structure the YAML like this:
```yaml
# _data/navigation.yml
foo:
- title: "Parent Link 1"
url: /parent-1-page-url/
children:
- title: "Child Link 1"
url: /child-1-page-url/
- title: "Child Link 2"
url: /child-2-page-url/
- title: "Parent Link 2"
url: /parent-2-page-url/
children:
- title: "Child Link 1"
url: /child-1-page-url/
- title: "Child Link 2"
url: /child-2-page-url/
- title: "Child Link 3"
url: /child-3-page-url/
```
**2:** On the page(s) you'd like the `foo` sidebar nav add the following YAML Front Matter, referencing the same key name.
```yaml
sidebar:
nav: "foo"
```
**ProTip:** If you're applying the same navigation list to several pages setting it as a [Front Matter default](https://jekyllrb.com/docs/configuration/#front-matter-defaults) is the better option.
The theme's documentation is built with the `nav_list` helper so if you'd like an example to dissect take a look at `navigation.yml`, `_config.yml` and `_doc` collection in the [`/docs/` folder](https://github.com/{{ site.repository }}/tree/master/docs/) of this repo.
