restored relative time functionality

Author: Oaphi

app/assets/javascripts/relative_time.js

@@ -0,0 +1,35 @@
+document.addEventListener('DOMContentLoaded', () => {
+  const updateInterval = 6e4; // updates relative time once a minute
+  let lastRunAt = -1;
+
+  /**
+   * @type {FrameRequestCallback}
+   */
+  const updateRelativeTime = (timestamp) => {
+    const elapsed = timestamp - lastRunAt;
+
+    if (elapsed < updateInterval && lastRunAt !== -1) {
+      requestAnimationFrame(updateRelativeTime);
+      return;
+    }
+
+    document.querySelectorAll('[data-relstamp]').forEach((el) => {
+      if (!QPixel.DOM?.isHTMLElement(el)) {
+        return;
+      }
+
+      const { relstamp } = el.dataset;
+
+      if (!relstamp) {
+        return;
+      }
+
+      el.textContent = `${QPixel.DOM.formatTimestamp(relstamp)} (${moment(relstamp).fromNow()})`;
+    });
+
+    lastRunAt = timestamp;
+    requestAnimationFrame(updateRelativeTime);
+  };
+
+  requestAnimationFrame(updateRelativeTime);
+});