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114 lines
3.7 KiB
Markdown
114 lines
3.7 KiB
Markdown
# Adding a comment system
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Material for MkDocs allows to easily add the third-party comment system of your
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choice to the footer of any page by using [theme extension]. As an example,
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we'll be integrating [Giscus], which is Open Source, free, and uses GitHub
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discussions as a backend.
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[Giscus]: https://giscus.app/
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## Customization
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### Giscus integration
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Before you can use [Giscus], you need to complete the following steps:
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1. __Install the [Giscus GitHub App]__ and grant access to the repository
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that should host comments as GitHub discussions. Note that this can be a
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repository different from your documentation.
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2. __Visit [Giscus] and generate the snippet__ through their configuration tool
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to load the comment system. Copy the snippet for the next step. The
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resulting snippet should look similar to this:
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``` html
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<script
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src="https://giscus.app/client.js"
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data-repo="<username>/<repository>"
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data-repo-id="..."
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data-category="..."
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data-category-id="..."
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data-mapping="pathname"
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data-reactions-enabled="1"
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data-emit-metadata="1"
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data-theme="light"
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data-lang="en"
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crossorigin="anonymous"
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async
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>
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</script>
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```
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The [`comments.html`][comments] partial (empty by default) is the best place to
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add the snippet generated by [Giscus]. Follow the guide on [theme extension]
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and [override the `comments.html` partial][overriding partials] with:
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``` html hl_lines="3"
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{% if page.meta.comments %}
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<h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
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<!-- Insert generated snippet here -->
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<!-- Synchronize Giscus theme with palette -->
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<script>
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var giscus = document.querySelector("script[src*=giscus]")
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// Set palette on initial load
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var palette = __md_get("__palette")
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if (palette && typeof palette.color === "object") {
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var theme = palette.color.scheme === "slate"
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? "transparent_dark"
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: "light"
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// Instruct Giscus to set theme
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giscus.setAttribute("data-theme", theme) // (1)!
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}
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// Register event handlers after documented loaded
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document.addEventListener("DOMContentLoaded", function() {
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var ref = document.querySelector("[data-md-component=palette]")
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ref.addEventListener("change", function() {
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var palette = __md_get("__palette")
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if (palette && typeof palette.color === "object") {
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var theme = palette.color.scheme === "slate"
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? "transparent_dark"
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: "light"
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// Instruct Giscus to change theme
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var frame = document.querySelector(".giscus-frame")
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frame.contentWindow.postMessage(
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{ giscus: { setConfig: { theme } } },
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"https://giscus.app"
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)
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}
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})
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})
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</script>
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{% endif %}
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```
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1. This code block ensures that [Giscus] renders with a dark theme when the
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palette is set to `slate`. Note that multiple dark themes are available,
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so you can change it to your liking.
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Replace the highlighted line with the snippet you generated with the [Giscus]
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configuration tool in the previous step. If you copied the snippet from above,
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you can enable comments on a page by setting the `comments` front matter
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property to `true`:
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``` yaml
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---
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comments: true
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---
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# Page title
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...
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```
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If you wish to enable comments for an entire folder, you can use the
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[built-in meta plugin].
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[Giscus GitHub App]: https://github.com/apps/giscus
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[theme extension]: ../customization.md#extending-the-theme
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[comments]: https://github.com/squidfunk/mkdocs-material/blob/master/src/templates/partials/comments.html
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[overriding partials]: ../customization.md#overriding-partials
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[built-in meta plugin]: ../plugins/meta.md
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