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82 lines
2 KiB
Markdown
82 lines
2 KiB
Markdown
+++
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categories = ["explanation", "howto"]
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description = "How to extend image effects"
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options = ["imageEffects"]
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title = "Image Effects"
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weight = 3
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+++
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This page shows you, how to configure custom [image effects](authoring/markdown#image-effects) on top of existing ones.
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This setting can also [be overridden by your front matter](authoring/imageeffects).
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If you don't configure anything in your `hugo.toml`, the image effects default to
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## Default Values
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{{< multiconfig >}}
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[imageEffects]
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border = false
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lazy = true
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lightbox = true
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shadow = false
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{{< /multiconfig >}}
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## Configuration
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{{% badge style="cyan" icon="gears" title=" " %}}Option{{% /badge %}} You can change these settings in your `hugo.toml` and add arbitrary custom effects as boolean values (like `bg-white` in the below snippet).
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{{< multiconfig file=hugo >}}
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[params]
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[params.imageEffects]
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bg-white = true
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border = true
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lazy = false
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{{< /multiconfig >}}
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This would result in
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{{< multiconfig >}}
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[imageEffects]
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bg-white = true
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border = true
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lazy = false
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lightbox = true
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shadow = false
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{{< /multiconfig >}}
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### Example
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With this configuration in effect, the following URL
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````markdown {title="Markdown"}
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````
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would result in
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````html {title="HTML"}
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<img src="https://octodex.github.com/images/minion.png" loading="lazy" alt="Minion" class="bg-white border nolazy lightbox noshadow">
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````
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## Styling Effects
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If the resulting effect value is
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- `true`: add a class with the effect's name
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- `false`: add a class with the effect's name and a "no" prefix
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Styles for default effects are contained in the theme. Add styles for your custom effects to `layouts/partials/content-header.html`.
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For the above example you could add styles for both boolean cases:
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````html {title="layouts/partials/content-header.html"}
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<style>
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img.bg-white {
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background-color: white;
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}
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img.nobg-white {
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background-color: transparent;
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}
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</style>
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````
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