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97 lines
3.3 KiB
Markdown
97 lines
3.3 KiB
Markdown
---
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template: overrides/main.html
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---
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# 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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You can either integrate [Giscus] on every page by overriding the `main.html`
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template, or create a new template (e.g. `blog.html`) to extend from `main.html`
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which includes the comment system, so you can decide for each page whether you
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want to allow comments or not.
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In order to integrate [Giscus], follow the guide on [theme extension] and
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[override the `content` block][overriding blocks], extending the default by
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calling the `super()` function at the beginning of the block:
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``` html hl_lines="6"
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{% block content %}
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{{ super() }}
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<!-- Giscus -->
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<h2 id="__comments">{{ lang.t("meta.comments") }}</h2>
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<!-- Replace with generated snippet -->
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<!-- Reload on palette change -->
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<script>
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var palette = __md_get("__palette")
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if (palette && typeof palette.color === "object")
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if (palette.color.scheme === "slate") {
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var giscus = document.querySelector("script[src*=giscus]")
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giscus.setAttribute("data-theme", "dark") // (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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component$.subscribe(function (component) {
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if (component.ref === ref)
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location.reload()
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})
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})
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</script>
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{% endblock %}
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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 extended `main.html`, you should
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now see the [Giscus] comment system at the bottom of each page. If you created
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a new, separate template, you can enable Giscus by [setting the page template]
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via front matter.
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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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[overriding blocks]: ../customization.md#overriding-blocks
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[setting the page template]: ../reference/index.md#setting-the-page-template
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