feat: add YouTube chapter markers to community feed

blocks/feed/feed.css

@@ -3,7 +3,7 @@
   display: none;
 }
 
-.feed[data-rendered='true'] {
+.feed[data-rendered="true"] {
   display: block;
 }
 
@@ -246,7 +246,7 @@
     gap: var(--spacing-m);
     padding: var(--spacing-xs) 0;
   }
-  
+
   .feed.blog > div {
     padding-top: unset;
   }
@@ -311,3 +311,83 @@
     margin-bottom: 1em;
   }
 }
+
+/* Chapter markers styles */
+.chapter-markers {
+  margin-top: var(--spacing-m);
+  padding: var(--spacing-s);
+  background: var(--bg-color-lightgrey);
+  border-radius: var(--card-border-radius-s);
+}
+
+.chapters-title {
+  font-size: var(--type-body-s-size);
+  font-weight: 600;
+  margin-bottom: var(--spacing-xs);
+  color: var(--text-color);
+}
+
+.chapters-list {
+  list-style: none;
+  padding: 0;
+  margin: 0;
+}
+
+.chapter-item {
+  margin-bottom: var(--spacing-xxs);
+}
+
+.chapter-link {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-xs);
+  text-decoration: none;
+  color: inherit;
+  padding: var(--spacing-xxs) var(--spacing-xs);
+  border-radius: 4px;
+  transition: background-color 0.2s ease;
+}
+
+.chapter-link:hover {
+  background-color: rgb(0 0 0 / 5%);
+}
+
+.chapter-timestamp {
+  font-family: monospace;
+  font-size: var(--type-body-xs-size);
+  color: var(--color-accent-purple);
+  font-weight: 600;
+  min-width: 45px;
+}
+
+.chapter-title {
+  font-size: var(--type-body-xs-size);
+  line-height: 1.3;
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  /* stylelint-disable-next-line value-no-vendor-prefix */
+  display: -webkit-box;
+  -webkit-line-clamp: 2;
+  -webkit-box-orient: vertical;
+}
+
+@media screen and (width >= 768px) {
+  .chapter-markers {
+    margin-top: var(--spacing-s);
+  }
+
+  .chapters-title {
+    font-size: var(--type-body-xs-size);
+  }
+}
+
+@media screen and (width >= 900px) {
+  .chapter-timestamp {
+    font-size: var(--type-body-xxs-size);
+  }
+
+  .chapter-title {
+    font-size: var(--type-body-xxs-size);
+  }
+}

blocks/feed/feed.js

@@ -6,6 +6,68 @@ import {
   decorateGuideTemplateCodeBlock,
 } from '../../scripts/scripts.js';
 
+// Convert timestamp to seconds
+function timeToSeconds(time) {
+  const parts = time.split(':').map(Number);
+  if (parts.length === 3) {
+    return parts[0] * 3600 + parts[1] * 60 + parts[2];
+  }
+  return parts[0] * 60 + parts[1];
+}
+
+// Parse timestamps from video description
+function parseChapterTimestamps(description, videoUrl) {
+  if (!description) return [];
+
+  // Match timestamps like 00:00, 0:00, 01:23, 1:23:45
+  const timestampRegex = /(?:^|\n)(\d{1,2}:\d{1,2}:\d{2}|\d{1,2}:\d{2})\s+([^\n]+)/g;
+  const chapters = [];
+  let match = timestampRegex.exec(description);
+
+  while (match !== null) {
+    const [, time, title] = match;
+    const seconds = timeToSeconds(time);
+    chapters.push({
+      timestamp: time,
+      title: title.trim(),
+      seconds,
+      url: `${videoUrl}&t=${seconds}s`,
+    });
+    match = timestampRegex.exec(description);
+  }
+
+  return chapters;
+}
+
+// Create chapter markers UI
+function createChapterMarkers(chapters) {
+  if (!chapters || chapters.length === 0) return null;
+
+  const chaptersContainer = createTag('div', { class: 'chapter-markers' });
+  const chaptersTitle = createTag('h4', { class: 'chapters-title' }, 'Chapters');
+  chaptersContainer.appendChild(chaptersTitle);
+
+  const chaptersList = createTag('ul', { class: 'chapters-list' });
+  chapters.forEach((chapter) => {
+    const listItem = createTag('li', { class: 'chapter-item' });
+    const link = createTag('a', {
+      href: chapter.url,
+      target: '_blank',
+      class: 'chapter-link',
+    });
+    const timestamp = createTag('span', { class: 'chapter-timestamp' }, chapter.timestamp);
+    const title = createTag('span', { class: 'chapter-title' }, chapter.title);
+
+    link.appendChild(timestamp);
+    link.appendChild(title);
+    listItem.appendChild(link);
+    chaptersList.appendChild(listItem);
+  });
+
+  chaptersContainer.appendChild(chaptersList);
+  return chaptersContainer;
+}
+
 // logic for rendering the community feed
 export async function renderFeed(block) {
   if (!block) {
@@ -44,6 +106,13 @@ export async function renderFeed(block) {
     image.appendChild(img);
     div.appendChild(image);
 
+    // Add chapter markers if timestamps are found in description
+    const chapters = parseChapterTimestamps(page.Description, page.URL);
+    const chapterMarkers = createChapterMarkers(chapters);
+    if (chapterMarkers) {
+      div.appendChild(chapterMarkers);
+    }
+
     gridDiv.appendChild(div);
     if (index % 3 === 2 || index === archivePageIndex.length - 1) {
       parentDiv.appendChild(gridDiv);