fix(a11y): respect prefers-reduced-motion in back-to-top scroll

vinta · claude · vinta · commit d58c915a0b40 · 2026-03-24T12:37:36.000+08:00
Swap the hardcoded 'smooth' scroll behavior for a runtime check so users
who have enabled reduced-motion in their OS get instant (auto) scrolling
instead of the animated kind.

Co-Authored-By: Claude &lt;noreply@anthropic.com&gt;
diff --git a/website/static/main.js b/website/static/main.js
@@ -394,7 +394,8 @@ if (backToTop) {
   backToTop.addEventListener("click", function () {
     const target = searchInput || resultsSection;
     if (!target) return;
-    target.scrollIntoView({ behavior: "smooth", block: "center" });
+    var motion = window.matchMedia("(prefers-reduced-motion: reduce)").matches ? "auto" : "smooth";
+    target.scrollIntoView({ behavior: motion, block: "center" });
     if (searchInput) searchInput.focus();
   });
 
