Jinja2 template support

Wagtail supports Jinja2 templating for all front end features. More information on each of the template tags below can be found in the Writing templates documentation.

Configuring Django

Django needs to be configured to support Jinja2 templates. As the Wagtail admin is written using standard Django templates, Django has to be configured to use both templating engines. Add the Jinja2 template backend configuration to the TEMPLATES setting for your app as shown here:

TEMPLATES = [
    {
        "BACKEND": "django.template.backends.django.DjangoTemplates",
        # ... the rest of the existing Django template configuration ...
    },
    {
        'BACKEND': 'django.template.backends.jinja2.Jinja2',
        'APP_DIRS': True,
        'OPTIONS': {
            'extensions': [
                'wagtail.jinja2tags.core',
                'wagtail.admin.jinja2tags.userbar',
                'wagtail.images.jinja2tags.images',
            ],
        },
    }
]

Jinja templates must be placed in a jinja2/ directory in your app. For example, the standard template location for an EventPage model in an events app would be events/jinja2/events/event_page.html.

By default, the Jinja environment does not have any Django functions or filters. The Django documentation has more information on django.template.backends.jinja2.Jinja2 (configuring Jinja for Django).

self in templates

In Django templates, self can be used to refer to the current page, stream block, or field panel. In Jinja, self is reserved for internal use. When writing Jinja templates, use page to refer to pages, value for stream blocks, and field_panel for field panels.

Template tags, functions & filters

fullpageurl()

Generate an absolute URL (https://example.com/foo/bar/) for a Page instance:

<meta property="og:url" content="{{ fullpageurl(page) }}" />

See fullpageurl for more information.

pageurl()

Generate a URL (/foo/bar/) for a Page instance:

<a href="{{ pageurl(page.more_information) }}">More information</a>

See pageurl for more information

slugurl()

Generate a URL for a Page with a slug:

<a href="{{ slugurl("about") }}">About us</a>

See slugurl for more information

image()

Resize an image, and render an <img> tag:

{{ image(page.header_image, "fill-1024x200", class="header-image") }}

Or resize an image and retrieve the resized image object (rendition) for more bespoke use:

{% set background=image(page.background_image, "max-1024x1024") %}
<div class="wrapper" style="background-image: url({{ background.url }});"></div>

When working with SVG images, you can use preserve-svg in the filter string to prevent operations that would require rasterizing the SVG. When preserve-svg is present and the image is an SVG, operations that would require rasterization (like format conversion) will be automatically filtered out, ensuring SVGs remain as vector graphics. This is especially useful in loops processing both raster images and SVGs.

{{ image(page.svg_image, "width-400|format-webp|preserve-svg") }}

See How to use images in templates for more information

srcset_image()

Resize an image, and render an <img> tag including srcset with multiple sizes. Browsers will select the most appropriate image to load based on responsive image rules. The sizes attribute is essential unless you store the output of srcset_image for later use.

{{ srcset_image(page.photo, "width-{400,800}", sizes="(max-width: 600px) 400px, 80vw") }}

This outputs:

<img srcset="/media/images/pied-wagtail.width-400.jpg 400w, /media/images/pied-wagtail.width-800.jpg 800w" src="/media/images/pied-wagtail.width-400.jpg" alt="A pied Wagtail" sizes="(max-width: 600px) 400px, 80vw" width="400" height="300">

Or resize an image and retrieve the renditions for more bespoke use:

{% set bg=srcset_image(page.background_image, "max-{512x512,1024x1024}") %}
<div class="wrapper" style="background-image: image-set(url({{ bg.renditions[0].url }}) 1x, url({{ bg.renditions[1].url }}) 2x);"></div>

When working with SVG images, you can use preserve-svg in the filter string to prevent operations that would require rasterizing the SVG.

{{ srcset_image(page.svg_image, "width-400|format-webp|preserve-svg") }}

picture()

Resize or convert an image, rendering a <picture> tag including multiple source formats with srcset for multiple sizes, and a fallback <img> tag. Browsers will select the first supported image format, and pick a size based on responsive image rules.

picture can render an image in multiple formats:

{{ picture(page.photo, "format-{avif,webp,jpeg}|width-400") }}

This outputs:

<picture>
    <source srcset="/media/images/pied-wagtail.width-400.avif" type="image/avif">
    <source srcset="/media/images/pied-wagtail.width-400.webp" type="image/webp">
    <img src="/media/images/pied-wagtail.width-400.jpg" alt="A pied Wagtail" width="400" height="300">
</picture>

Or render multiple formats and multiple sizes like srcset_image does. The sizes attribute is essential when the picture tag renders images in multiple sizes:

{{ picture(page.header_image, "format-{avif,webp,jpeg}|width-{400,800}", sizes="80vw") }}

This outputs:

<picture>
    <source sizes="80vw" srcset="/media/images/pied-wagtail.width-400.avif 400w, /media/images/pied-wagtail.width-800.avif 800w" type="image/avif">
    <source sizes="80vw" srcset="/media/images/pied-wagtail.width-400.webp 400w, /media/images/pied-wagtail.width-800.webp 800w" type="image/webp">
    <img sizes="80vw" srcset="/media/images/pied-wagtail.width-400.jpg 400w, /media/images/pied-wagtail.width-800.jpg 800w" src="/media/images/pied-wagtail.width-400.jpg" alt="A pied Wagtail" width="400" height="300">
</picture>

Or resize an image and retrieve the renditions for more bespoke use:

{% set bg=picture(page.background_image, "format-{avif,jpeg}|max-{512x512,1024x1024}") %}
<div class="wrapper" style="background-image: image-set(url({{ bg.formats['avif'][0].url }}) 1x type('image/avif'), url({{ bg.formats['avif'][1].url }}) 2x type('image/avif'), url({{ bg.formats['jpeg'][0].url }}) 1x type('image/jpeg'), url({{ bg.formats['jpeg'][1].url }}) 2x type('image/jpeg'));"></div>

For SVG images, you can use preserve-svg in the filter string to ensure they remain as vector graphics:

{{ picture(page.header_image, "format-{avif,webp,jpeg}|width-{400,800}|preserve-svg", sizes="80vw") }}

|richtext

Transform Wagtail’s internal HTML representation, expanding internal references to pages and images.

{{ page.body|richtext }}

See Rich text (filter) for more information

wagtail_site

Returns the Site object corresponding to the current request.

{{ wagtail_site().site_name }}

See wagtail_site for more information

wagtailuserbar()

Output the Wagtail contextual flyout menu for editing pages from the front end

{{ wagtailuserbar() }}

See Wagtail user bar for more information

{% include_block %}

Output the HTML representation for the stream content as a whole, as well as for each individual block.

Allows to pass template context (by default) to the StreamField template.

{% include_block page.body %}
{% include_block page.body with context %} {# The same as the previous #}
{% include_block page.body without context %}

See StreamField template rendering for more information.

Note

The {% include_block %} tag is designed to closely follow the syntax and behavior of Jinja’s {% include %}, so it does not implement the Django version’s feature of only passing specified variables into the context.