mkdocs-material/docs/reference/images.md

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# Images

While images are first-class citizens of Markdown and part of the core syntax, 
it can be difficult to work with them. Material for MkDocs makes working with 
images more comfortable, providing styles for image alignment and image
captions.

## Configuration

This configuration adds the ability to align images, add captions to images
(rendering them as figures), and mark large images for lazy-loading. Add the
following lines to `mkdocs.yml`:

``` yaml
markdown_extensions:
  - attr_list
  - md_in_html
```

See additional configuration options:

- [Attribute Lists]
- [Markdown in HTML]

  [Attribute Lists]: ../setup/extensions/python-markdown.md#attribute-lists
  [Markdown in HTML]: ../setup/extensions/python-markdown.md#markdown-in-html

## Usage

### Image alignment

When [Attribute Lists] is enabled, images can be aligned by adding the
respective alignment directions via the `align` attribute, i.e. `align=left` or
`align=right`:

=== "Left"

    _Example_:

    ``` markdown
    ![Placeholder](https://dummyimage.com/600x400/eee/aaa){ align=left }
    ```

    _Result_:

    ![Placeholder](https://dummyimage.com/600x400/f5f5f5/aaaaaa&text=–%20Image%20–){ align=left width=300 }

    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla et euismod
    nulla. Curabitur feugiat, tortor non consequat finibus, justo purus auctor
    massa, nec semper lorem quam in massa.

=== "Right"

    _Example_:

    ``` markdown
    ![Placeholder](https://dummyimage.com/600x400/eee/aaa){ align=right }
    ```

    _Result_:

    ![Placeholder](https://dummyimage.com/600x400/f5f5f5/aaaaaa&text=–%20Image%20–){ align=right width=300 }

    Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nulla et euismod
    nulla. Curabitur feugiat, tortor non consequat finibus, justo purus auctor
    massa, nec semper lorem quam in massa.

If there's insufficient space to render the text next to the image, the image
will stretch to the full width of the viewport, e.g. on mobile viewports.

??? question "Why is there no centered alignment?"

    The [`align`][align] attribute doesn't allow for centered alignment, which
    is why this option is not supported by Material for MkDocs.[^1] Instead,
    the [image captions] syntax can be used, as captions are optional.

  [^1]:
    You might also realize that the [`align`][align] attribute has been
    deprecated as of HTML5, so why use it anyways? The main reason is
    portability – it's still supported by all browsers and clients, and is very
    unlikely to be completely removed, as many older websites still use it. This
    ensures a consistent appearance when a Markdown file with these attributes
    is viewed outside of a website generated by Material for MkDocs.

  [align]: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img#deprecated_attributes
  [image captions]: #image-captions

### Image captions

Sadly, the Markdown syntax doesn't provide native support for image captions,
but it's always possible to use HTML. Using `figure` and `figcaption`, captions
can be added to images.

_Example_:

```html
<figure markdown> <!-- (1) -->
  ![Dummy image](https://dummyimage.com/600x400/){ width="300" }
  <figcaption>Image caption</figcaption>
</figure>
```

1.  :man_raising_hand: Remember to enable the [Markdown in HTML] extension.

_Result_:

<figure markdown>
  ![Dummy image]{ width="300" }
  <figcaption>Image caption</figcaption>
</figure>

  [Dummy image]: https://dummyimage.com/600x400/f5f5f5/aaaaaa&text=–%20Image%20–
  [Markdown in HTML]: ../setup/extensions/python-markdown.md#markdown-in-html

### Image lazy-loading

Modern browsers provide [native support for lazy-loading images][lazy-loading]
through the `loading=lazy` directive, which degrades to eager-loading in
browsers without support

_Example_:

``` markdown
![Placeholder](https://dummyimage.com/600x400/eee/aaa){ loading=lazy }
```

_Result_:

![Placeholder](https://dummyimage.com/600x400/f5f5f5/aaaaaa&text=–%20Image%20–){ loading=lazy width=300 }

  [lazy-loading]: https://caniuse.com/#feat=loading-lazy-attr