Docusaurus 添加评论功能

未经作者允许请勿转载
更好的阅读体验查看我的博客原文

获取 Giscus 配置参数

首先根据 Giscus官网 的步骤配置安装并获取配置后的参数。

选择 giscus 连接到的仓库。请确保：

1. 此仓库是公开的，否则访客将无法查看 discussion。
2. giscus app 已安装否则访客将无法评论和回应。
3. Discussions功能已在你的仓库中启用。

Docusaurus 中安装 Giscus

yarn add @giscus/react

然后我们封装一个评论组件方便使用

import React from 'react';
import Giscus from '@giscus/react';

export const Comment = () => {
    
    
  return (
    <div style={
    
    {
    
     paddingTop: 50 }}>
      <Giscus
        id="comments"
        // highlight-warn-start
        // 这部分填写你自己的
        repo="3Alan/site"
        repoId=""
        category="Announcements"
        categoryId=""
        // highlight-warn-end
        mapping="title"
        strict="1"
        term="Welcome to @giscus/react component!"
        reactionsEnabled="1"
        emitMetadata="0"
        inputPosition="bottom"
        theme="dark_dimmed"
        lang="zh-CN"
        loading="lazy"
      />
    </div>
  );
};

export default Comment;

Swizzling Docusaurus 内部组件

Swizzling 文档页面对应组件

yarn run swizzle @docusaurus/theme-classic DocItem/Layout -- --eject --typescript

:::caution

因为我的项目是基于 typescript 的，如果你的项目是 javascript 的话，则不需要加后面的 --typescript

:::

Swizzling 后会生成 src/theme/DocItem/Layout 目录，我们需要对 src/theme/DocItem/Layout/index.tsx 进行修改

import React from 'react';
import clsx from 'clsx';
import {
    
     useWindowSize } from '@docusaurus/theme-common';
  // @ts-ignore
import {
    
     useDoc } from '@docusaurus/theme-common/internal';
import DocItemPaginator from '@theme/DocItem/Paginator';
import DocVersionBanner from '@theme/DocVersionBanner';
import DocVersionBadge from '@theme/DocVersionBadge';
import DocItemFooter from '@theme/DocItem/Footer';
import DocItemTOCMobile from '@theme/DocItem/TOC/Mobile';
import DocItemTOCDesktop from '@theme/DocItem/TOC/Desktop';
import DocItemContent from '@theme/DocItem/Content';
import DocBreadcrumbs from '@theme/DocBreadcrumbs';
import type {
    
     Props } from '@theme/DocItem/Layout';

import styles from './styles.module.css';
// highlight-add-line
import Comment from '../../../components/comment';

/**
 * Decide if the toc should be rendered, on mobile or desktop viewports
 */
function useDocTOC() {
    
    
  const {
    
     frontMatter, toc } = useDoc();
  const windowSize = useWindowSize();

  const hidden = frontMatter.hide_table_of_contents;
  const canRender = !hidden && toc.length > 0;

  const mobile = canRender ? <DocItemTOCMobile /> : undefined;

  const desktop =
    canRender && (windowSize === 'desktop' || windowSize === 'ssr') ? (
      <DocItemTOCDesktop />
    ) : undefined;

  return {
    
    
    hidden,
    mobile,
    desktop
  };
}

export default function DocItemLayout({
    
     children }: Props): JSX.Element {
    
    
  const docTOC = useDocTOC();
  return (
    <div className="row">
      <div className={
    
    clsx('col', !docTOC.hidden && styles.docItemCol)}>
        <DocVersionBanner />
        <div className={
    
    styles.docItemContainer}>
          <article>
            <DocBreadcrumbs />
            <DocVersionBadge />
            {
    
    docTOC.mobile}
            <DocItemContent>{
    
    children}</DocItemContent>
            <DocItemFooter />
          </article>
          <DocItemPaginator />
        </div>

        // highlight-add-line
        <Comment />
      </div>
      {
    
    docTOC.desktop && <div className="col col--3">{
    
    docTOC.desktop}</div>}
    </div>
  );
}

Swizzling 博客页面对应组件

yarn run swizzle @docusaurus/theme-classic BlogPostPage -- --eject --typescript 

同样修改文件

import React, {
    
     type ReactNode } from 'react';
import clsx from 'clsx';
import {
    
    
  HtmlClassNameProvider,
  ThemeClassNames
} from '@docusaurus/theme-common';

import {
    
    
  BlogPostProvider,
  useBlogPost
  // @ts-ignore
} from '@docusaurus/theme-common/internal';
import BlogLayout from '@theme/BlogLayout';
import BlogPostItem from '@theme/BlogPostItem';
import BlogPostPaginator from '@theme/BlogPostPaginator';
import BlogPostPageMetadata from '@theme/BlogPostPage/Metadata';
import TOC from '@theme/TOC';
import type {
    
     Props } from '@theme/BlogPostPage';
import type {
    
     BlogSidebar } from '@docusaurus/plugin-content-blog';
// highlight-add-line
import Comment from '../../components/comment';

function BlogPostPageContent({
    
    
  sidebar,
  children
}: {
    
    
  sidebar: BlogSidebar;
  children: ReactNode;
}): JSX.Element {
    
    
  const {
    
     metadata, toc } = useBlogPost();
  const {
    
     nextItem, prevItem, frontMatter } = metadata;
  const {
    
    
    hide_table_of_contents: hideTableOfContents,
    toc_min_heading_level: tocMinHeadingLevel,
    toc_max_heading_level: tocMaxHeadingLevel
  } = frontMatter;
  return (
    <BlogLayout
      sidebar={
    
    sidebar}
      toc={
    
    
        !hideTableOfContents && toc.length > 0 ? (
          <TOC
            toc={
    
    toc}
            minHeadingLevel={
    
    tocMinHeadingLevel}
            maxHeadingLevel={
    
    tocMaxHeadingLevel}
          />
        ) : undefined
      }
    >
      <BlogPostItem>{
    
    children}</BlogPostItem>

      {
    
    (nextItem || prevItem) && (
        <BlogPostPaginator nextItem={
    
    nextItem} prevItem={
    
    prevItem} />
      )}

      // highlight-add-line
      <Comment />
    </BlogLayout>
  );
}

export default function BlogPostPage(props: Props): JSX.Element {
    
    
  const BlogPostContent = props.content;
  return (
    <BlogPostProvider content={
    
    props.content} isBlogPostPage>
      <HtmlClassNameProvider
        className={
    
    clsx(
          ThemeClassNames.wrapper.blogPages,
          ThemeClassNames.page.blogPostPage
        )}
      >
        <BlogPostPageMetadata />
        <BlogPostPageContent sidebar={
    
    props.sidebar}>
          <BlogPostContent />
        </BlogPostPageContent>
      </HtmlClassNameProvider>
    </BlogPostProvider>
  );
}

:::caution

Swizzling 后需要重新运行 Docusaurus ，不然是无法看到效果的

:::

大功告成

完成以上步骤后你就可以在每篇博客和每篇文档的底部看到评论功能了