https://rendercache.com/tags/social/ Recent content in Social on RenderCache.com Hugo en-us Sun, 18 Oct 2026 00:00:00 +0000 https://rendercache.com/fixing-blank-link-previews-from-slackbot-and-linkedinbot-on-javascript-apps/ Sun, 18 Oct 2026 00:00:00 +0000 https://rendercache.com/fixing-blank-link-previews-from-slackbot-and-linkedinbot-on-javascript-apps/ <p>Someone pastes a link to your new feature page into Slack. Instead of a card with the headline and a screenshot, the preview shows your app&rsquo;s generic title and the default logo. Or nothing at all. The same thing happens on LinkedIn, on X, in a Discord channel. The page itself is fine. The preview is wrong because of where the tags live.</p> <p>Most JavaScript apps set their Open Graph and Twitter card tags at runtime. Libraries like React Helmet and Vue Meta write <code>og:title</code>, <code>og:image</code> and <code>og:description</code> into the head after the app boots. The bots that build link previews don&rsquo;t boot the app. Slackbot, LinkedInBot, Twitterbot, facebookexternalhit and Discordbot fetch the HTML, read the head, and leave. What they read is the static <code>index.html</code> that every route shares.</p>