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196 lines
6.7 KiB
Markdown
196 lines
6.7 KiB
Markdown
---
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template: overrides/main.html
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---
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# Setting up social cards
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Social cards, also known as social previews, are images that are displayed when
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a link to your project documentation is shared on social media. Material for
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MkDocs can generate beautiful social cards automatically, using the [colors]
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[palette.primary], [fonts][font.text] and [logo][^1] defined in `mkdocs.yml`.
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[^1]:
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Both types of logos, images (`theme.logo`) and icons (`theme.icon.logo`)
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are supported. While an image logo is used as-is, icons are filled with the
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color used in the header (white or black), which depends on the primary
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color.
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[palette.primary]: changing-the-colors.md#primary-color
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[font.text]: changing-the-fonts.md#regular-font
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[logo]: changing-the-logo-and-icons.md#logo
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## Configuration
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### Built-in social cards
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[:octicons-heart-fill-24:{ .mdx-heart } Insiders][Insiders]{ .mdx-insiders } ·
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[:octicons-tag-24: insiders-2.12.0][Insiders] ·
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:octicons-cpu-24: Plugin ·
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:octicons-beaker-24: Experimental
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The built-in social cards plugin generates a social preview image for every page
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and adds the necessary meta tags, so it's displayed on social media when shared.
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First, ensure you've set [`site_url`][site_url] in `mkdocs.yml`.[^2] Then, add
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the following lines to `mkdocs.yml` to enable the plugin:
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[^2]:
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When using this plugin, the [`site_url`][site_url] setting is mandatory, as
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social preview images don't work with relative URLs.
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``` yaml
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plugins:
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- social
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```
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For example, the page on [setting up site analytics] renders as:
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<figure markdown>
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[![Social cards preview]][Social cards preview]
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<figcaption markdown>
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Want to try it out? Copy the current URL and paste it into [Twitter's Card
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validator] to see how social cards look in action.
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</figcaption>
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</figure>
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The following configuration options are available:
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`cards_color`{ #cards-color }
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: [:octicons-tag-24: insiders-2.13.0][Insiders] · :octicons-milestone-24:
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Default: [primary color][palette.primary] – This option specifies which
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colors to use for the background `fill` and foreground `text` when
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generating the social card:
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``` yaml
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plugins:
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- social:
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cards_color:
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fill: "#0FF1CE" # (1)
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text: "#FFFFFF"
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```
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1. Colors can either be defined as HEX colors, or as [CSS color keywords].
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Note that HEX colors must be enclosed in quotes.
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`cards_directory`{ #cards-directory }
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: :octicons-milestone-24: Default: `assets/images/social` – This option
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specifies where the generated social card images will be written to. It's
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normally not necessary to change this option:
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``` yaml
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plugins:
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- social:
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cards_directory: assets/images/social
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```
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[Insiders]: ../insiders/index.md
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[site_url]: https://www.mkdocs.org/user-guide/configuration/#site_url
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[setting up site analytics]: setting-up-site-analytics.md
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[Social cards preview]: ../assets/screenshots/social-cards.png
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[Twitter's Card validator]: https://cards-dev.twitter.com/validator
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[meta tags]: #meta-tags
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[CSS color keywords]: https://developer.mozilla.org/en-US/docs/Web/CSS/color_value#color_keywords
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#### Caching <small>recommended</small> { #caching data-toc-label="Caching" }
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The [built-in social cards] plugin automatically fetches the fonts you define
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in `mkdocs.yml` from Google Fonts, and uses them to render the text that is
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displayed on the social card. The font files and generated cards are both
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written to the `.cache` directory, which is used in subsequent builds to detect
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whether the social cards need to be regenerated. You might want to:
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1. Ignore the `.cache` directory in your project, by adding it to `.gitignore`.
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2. When building your site for publishing, use a build cache to save the
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`.cache` directory in between builds. Taking the example from the
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[publishing guide], add the following lines:
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``` yaml hl_lines="15-18"
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name: ci
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on:
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push:
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branches:
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- master
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- main
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jobs:
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deploy:
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runs-on: ubuntu-latest
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steps:
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- uses: actions/checkout@v2
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- uses: actions/setup-python@v2
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with:
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python-version: 3.x
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- uses: actions/cache@v2
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with:
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key: ${{ github.ref }}
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path: .cache
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- run: pip install mkdocs-material
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- run: mkdocs gh-deploy --force
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```
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[built-in social cards]: #built-in-social-cards
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[publishing guide]: ../publishing-your-site.md#with-github-actions
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#### Meta tags
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The [built-in social cards] plugin automatically sets all necessary `meta` tags,
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equivalent to the following two customizations, which you can set manually when
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you don't want to use it:
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=== ":material-graph: Open Graph"
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``` html
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{% block extrahead %}
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{% set title = config.site_name %}
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{% if page and page.meta and page.meta.title %}
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{% set title = title ~ " - " ~ page.meta.title %}
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{% elif page and page.title and not page.is_homepage %}
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{% set title = title ~ " - " ~ page.title %}
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{% endif %}
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<meta property="og:type" content="website" />
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<meta property="og:title" content="{{ title }}" />
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<meta property="og:description" content="{{ config.site_description }}" />
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<meta property="og:url" content="{{ page.canonical_url }}" />
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<meta property="og:image" content="<url>" />
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<meta property="og:image:type" content="image/png" />
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<meta property="og:image:width" content="1200" />
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<meta property="og:image:height" content="630" />
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{% endblock %}
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```
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=== ":fontawesome-brands-twitter: Twitter Cards"
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``` html
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{% block extrahead %}
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{% set title = config.site_name %}
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{% if page and page.meta and page.meta.title %}
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{% set title = title ~ " - " ~ page.meta.title %}
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{% elif page and page.title and not page.is_homepage %}
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{% set title = title ~ " - " ~ page.title %}
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{% endif %}
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<meta name="twitter:card" content="summary_large_image" />
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<meta name="twitter:title" content="{{ title }}" />
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<meta name="twitter:description" content="{{ config.site_description }}" />
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<meta name="twitter:image" content="<url>" />
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{% endblock %}
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```
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[Twitter Cards]: https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/abouts-cards
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## Usage
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If you want to adjust the title or set a custom description for the social card,
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you can use the [Metadata] extension, which takes precedence over the
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default values.
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- [Changing the title]
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- [Changing the description]
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[Metadata]: extensions/python-markdown.md#metadata
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[Changing the title]: ../reference/meta-tags.md#setting-the-page-title
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[Changing the description]: ../reference/meta-tags.md#setting-the-page-description
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