tech-interview-handbook/website/src/theme/DocItem/index.js

import React from 'react';
import clsx from 'clsx';
import DocPaginator from '@theme/DocPaginator';
import DocVersionBanner from '@theme/DocVersionBanner';
import DocVersionBadge from '@theme/DocVersionBadge';
import Seo from '@theme/Seo';
import DocItemFooter from '@theme/DocItemFooter';
import TOC from '@theme/TOC';
import TOCCollapsible from '@theme/TOCCollapsible';
import Heading from '@theme/Heading';
import styles from './styles.module.css';
import {ThemeClassNames, useWindowSize} from '@docusaurus/theme-common';
import SidebarAd from '../../components/SidebarAd';

const CarbonAd = React.memo(() => {
  return (
    <div>
      <script
        async
        type="text/javascript"
        src="//cdn.carbonads.com/carbon.js?serve=CEAI4537&placement=wwwtechinterviewhandbookorg"
        id="_carbonads_js"
      />
    </div>
  );
});

export default function DocItem(props) {
  const {content: DocContent} = props;
  const {metadata, frontMatter} = DocContent;
  const {
    image,
    keywords,
    hide_title: hideTitle,
    hide_table_of_contents: hideTableOfContents,
    toc_min_heading_level: tocMinHeadingLevel,
    toc_max_heading_level: tocMaxHeadingLevel,
  } = frontMatter;
  const {description, title} = metadata; // We only add a title if:
  // - user asks to hide it with front matter
  // - the markdown content does not already contain a top-level h1 heading

  const shouldAddTitle =
    !hideTitle && typeof DocContent.contentTitle === 'undefined';
  const windowSize = useWindowSize();
  const canRenderTOC =
    !hideTableOfContents && DocContent.toc && DocContent.toc.length > 0;
  // const renderTocDesktop =
  //   canRenderTOC && (windowSize === 'desktop' || windowSize === 'ssr');
  return (
    <>
      <Seo
        {...{
          title,
          description,
          keywords,
          image,
        }}
      />

      <div className="row">
        <div
          className={clsx('col', {
            [styles.docItemCol]: !hideTableOfContents,
          })}>
          <DocVersionBanner />
          <div className={styles.docItemContainer}>
            <article>
              <DocVersionBadge />

              {canRenderTOC && (
                <TOCCollapsible
                  toc={DocContent.toc}
                  minHeadingLevel={tocMinHeadingLevel}
                  maxHeadingLevel={tocMaxHeadingLevel}
                  className={clsx(
                    ThemeClassNames.docs.docTocMobile,
                    styles.tocMobile,
                  )}
                />
              )}
              <div
                className={clsx(ThemeClassNames.docs.docMarkdown, 'markdown')}>
                {/*
                Title can be declared inside md content or declared through front matter and added manually
                To make both cases consistent, the added title is added under the same div.markdown block
                See https://github.com/facebook/docusaurus/pull/4882#issuecomment-853021120
                */}
                {shouldAddTitle && (
                  <header>
                    <Heading as="h1">{title}</Heading>
                  </header>
                )}
                <DocItemFooter {...props} />
                <div className="margin-top--md">
                  <CarbonAd />
                </div>
                <div className="margin-top--md">
                  <DocContent />
                </div>
              </div>
            </article>
            <DocPaginator previous={metadata.previous} next={metadata.next} />
            <div className="margin-top--md">
              <SidebarAd position="docs_bottom" />
            </div>
          </div>
        </div>
        <div className="col col--3">
          {/* Change it such that sidebar ad is shown regardless whether there's a TOC */}
          <TOC
            toc={DocContent.toc}
            minHeadingLevel={tocMinHeadingLevel}
            maxHeadingLevel={tocMaxHeadingLevel}
            className={ThemeClassNames.docs.docTocDesktop}
          />
        </div>
      </div>
    </>
  );
}