feat: blog sidebar grouped by year

package.json

@@ -27,7 +27,9 @@
     "lint": "npx tsc --noEmit && prettier . --check && npm run lint:eslint && npm run lint:markdown",
     "lint:fix": "prettier . --write && npm run lint:eslint --fix && npm run lint:markdown --fix",
     "pre-build": "npx tsx ./scripts/pre-build.ts",
-    "prepare": "husky install"
+    "prepare": "husky install",
+    "heroku-cleanup": "npx patch-package",
+    "postinstall": "patch-package"
   },
   "dependencies": {
     "@docusaurus/core": "3.4.0",
@@ -86,6 +88,8 @@
     "make-dir": "^3.1.0",
     "mdast-util-frontmatter": "^2.0.1",
     "mdast-util-to-string": "^2.0.0",
+    "patch-package": "^8.0.0",
+    "postinstall-postinstall": "^2.1.0",
     "prettier": "^2.8.0",
     "remark": "^15.0.0",
     "remark-gfm": "^4.0.0",

patches/@docusaurus+plugin-content-blog+3.4.0.patch

@@ -0,0 +1,36 @@
+diff --git a/node_modules/@docusaurus/plugin-content-blog/lib/routes.js b/node_modules/@docusaurus/plugin-content-blog/lib/routes.js
+index 3400a26..98b1cd8 100644
+--- a/node_modules/@docusaurus/plugin-content-blog/lib/routes.js
++++ b/node_modules/@docusaurus/plugin-content-blog/lib/routes.js
+@@ -41,6 +41,7 @@ async function buildAllRoutes({ baseUrl, content, actions, options, aliasedSourc
+                 title: blogPost.metadata.title,
+                 permalink: blogPost.metadata.permalink,
+                 unlisted: blogPost.metadata.unlisted,
++                date: blogPost.metadata.date,
+             })),
+         };
+         const modulePath = await createData(`blog-post-list-prop-${pluginId}.json`, sidebar);
+diff --git a/node_modules/@docusaurus/plugin-content-blog/src/plugin-content-blog.d.ts b/node_modules/@docusaurus/plugin-content-blog/src/plugin-content-blog.d.ts
+index f4d4f13..f56deee 100644
+--- a/node_modules/@docusaurus/plugin-content-blog/src/plugin-content-blog.d.ts
++++ b/node_modules/@docusaurus/plugin-content-blog/src/plugin-content-blog.d.ts
+@@ -469,6 +469,7 @@ yarn workspace v1.22.19image` is a collocated image path, this entry will be the
+     title: string;
+     permalink: string;
+     unlisted: boolean;
++    date: Date | string;
+   };
+
+   export type BlogSidebar = {
+diff --git a/node_modules/@docusaurus/plugin-content-blog/src/routes.ts b/node_modules/@docusaurus/plugin-content-blog/src/routes.ts
+index a810ce1..2bf5cee 100644
+--- a/node_modules/@docusaurus/plugin-content-blog/src/routes.ts
++++ b/node_modules/@docusaurus/plugin-content-blog/src/routes.ts
+@@ -94,6 +94,7 @@ export async function buildAllRoutes({
+         title: blogPost.metadata.title,
+         permalink: blogPost.metadata.permalink,
+         unlisted: blogPost.metadata.unlisted,
++        date: blogPost.metadata.date
+       })),
+     };
+     const modulePath = await createData(

src/theme/BlogSidebar/Desktop/index.tsx

@@ -0,0 +1,62 @@
+import React from 'react';
+import clsx from 'clsx';
+import Link from '@docusaurus/Link';
+import { translate } from '@docusaurus/Translate';
+import type { Props } from '@theme/BlogSidebar/Desktop';
+import styles from './styles.module.css';
+
+const SidebarHeader = ({ title }: { title: string }) => (
+  <div className={clsx(styles.sidebarHeader, 'margin-bottom--md')}>{title}</div>
+);
+
+const YearHeader = ({ year }: { year: number }) => (
+  <h5 className={styles.sidebarItemTitle}>{year}</h5>
+);
+
+const SidebarItem = ({ item }: { item: Props['sidebar']['items'][number] }) => (
+  <li className={styles.sidebarItem}>
+    <Link
+      isNavLink
+      to={item.permalink}
+      className={styles.sidebarItemLink}
+      activeClassName={styles.sidebarItemLinkActive}
+    >
+      {item.title}
+    </Link>
+  </li>
+);
+
+export default function BlogSidebarDesktop({ sidebar }: Props) {
+  let currentYear = null;
+
+  return (
+    <aside className="col col--3">
+      <nav
+        className={clsx(styles.sidebar, 'thin-scrollbar')}
+        aria-label={translate({
+          id: 'theme.blog.sidebar.navAriaLabel',
+          message: 'Blog recent posts navigation',
+          description: 'The ARIA label for recent posts in the blog sidebar',
+        })}
+      >
+        <SidebarHeader title={sidebar.title} />
+        <ul className={clsx(styles.sidebarItemList, 'clean-list')}>
+          {sidebar.items.map((item) => {
+            const itemYear = new Date(item.date).getFullYear();
+            const yearHeader = currentYear !== itemYear && (
+              <YearHeader key={itemYear} year={itemYear} />
+            );
+            currentYear = itemYear;
+
+            return (
+              <React.Fragment key={item.permalink}>
+                {yearHeader}
+                <SidebarItem item={item} />
+              </React.Fragment>
+            );
+          })}
+        </ul>
+      </nav>
+    </aside>
+  );
+}

src/theme/BlogSidebar/Desktop/styles.module.css

@@ -0,0 +1,60 @@
+.sidebar {
+  max-height: calc(100vh - (var(--ifm-navbar-height) + 2rem));
+  overflow-y: auto;
+  position: sticky;
+  top: var(--ifm-navbar-height);
+  padding: 20px 12px 0 0;
+  margin-left: -20px;
+}
+
+.sidebarHeader {
+  font-size: var(--ifm-h4-font-size);
+  font-weight: var(--ifm-font-weight-bold);
+  padding-left: 12px;
+  display: block;
+}
+
+.sidebarItemTitle {
+  margin: 0.75rem 0 0.5rem;
+  color: var(--subtle);
+  padding-left: 12px;
+  border-bottom: 0.01rem solid var(--ifm-table-border-color);
+  padding-bottom: 4px;
+}
+
+.sidebarItemList {
+  font-size: 13px;
+}
+
+.sidebarItem {
+  margin-top: 0.1rem;
+  line-height: 18px;
+}
+
+.sidebarItemLink {
+  color: var(--ifm-font-color-base);
+  padding: 4px 8px;
+  display: block;
+  border-left: 4px solid transparent;
+  border-radius: 0.25rem;
+  line-height: 18px;
+}
+
+.sidebarItemLink:hover {
+  background: var(--ifm-menu-color-background-active);
+  color: var(--ifm-font-color-base);
+  text-decoration: none;
+}
+
+.sidebarItemLinkActive {
+  color: var(--ifm-font-color-base);
+  background: var(--ifm-menu-color-background-active);
+  border-left-color: var(--ifm-menu-color-active);
+  font-weight: 700;
+}
+
+@media (max-width: 996px) {
+  .sidebar {
+    display: none;
+  }
+}

src/theme/BlogSidebar/Mobile/index.tsx

@@ -0,0 +1,61 @@
+import React from 'react';
+import Link from '@docusaurus/Link';
+import { NavbarSecondaryMenuFiller } from '@docusaurus/theme-common';
+import styles from './styles.module.css';
+import clsx from 'clsx';
+import type { Props } from '@theme/BlogSidebar/Mobile';
+
+export const SidebarHeader = ({ title }: { title: string }) => (
+  <div className={clsx(styles.sidebarHeader, 'margin-bottom--md')}>{title}</div>
+);
+
+export const YearHeader = ({ year }: { year: number }) => (
+  <h5 className={styles.sidebarItemTitle}>{year}</h5>
+);
+
+export const SidebarItem = ({
+  item,
+}: {
+  item: Props['sidebar']['items'][number];
+}) => (
+  <li className="menu__list-item">
+    <Link
+      isNavLink
+      to={item.permalink}
+      className="menu__link"
+      activeClassName="menu__link--active"
+    >
+      {item.title}
+    </Link>
+  </li>
+);
+
+function BlogSidebarMobileSecondaryMenu({ sidebar }: Props) {
+  let currentYear = null;
+
+  return (
+    <ul className="menu__list blog-menu__list">
+      {sidebar.items.map((item) => {
+        const itemYear = new Date(item.date).getFullYear();
+        const yearHeader = currentYear !== itemYear && (
+          <YearHeader key={itemYear} year={itemYear} />
+        );
+        currentYear = itemYear;
+        return (
+          <React.Fragment key={item.permalink}>
+            {yearHeader}
+            <SidebarItem item={item} />
+          </React.Fragment>
+        );
+      })}
+    </ul>
+  );
+}
+export default function BlogSidebarMobile(props) {
+  return (
+    <NavbarSecondaryMenuFiller
+      component={BlogSidebarMobileSecondaryMenu}
+      props={props}
+    />
+  );
+}

src/theme/BlogSidebar/Mobile/styles.module.css

@@ -0,0 +1,7 @@
+.sidebarItemTitle {
+  margin: 0.75rem 0 0.5rem;
+  color: var(--subtle);
+  padding-left: 12px;
+  border-bottom: 0.01rem solid var(--ifm-table-border-color);
+  padding-bottom: 4px;
+}

src/theme/BlogSidebar/index.tsx

@@ -0,0 +1,17 @@
+import React from 'react';
+import { useWindowSize } from '@docusaurus/theme-common';
+import BlogSidebarDesktop from '@theme/BlogSidebar/Desktop';
+import BlogSidebarMobile from '@theme/BlogSidebar/Mobile';
+import type { Props } from '@theme/BlogSidebar';
+
+export default function BlogSidebar({ sidebar }: Props): JSX.Element | null {
+  const windowSize = useWindowSize();
+  if (!sidebar?.items.length) {
+    return null;
+  }
+  // Mobile sidebar doesn't need to be server-rendered
+  if (windowSize === 'mobile') {
+    return <BlogSidebarMobile sidebar={sidebar} />;
+  }
+  return <BlogSidebarDesktop sidebar={sidebar} />;
+}