diff --git a/docs/assets/scripts/theme-picker.js b/docs/assets/scripts/theme-picker.js
index 04df4843b..31310e77b 100644
--- a/docs/assets/scripts/theme-picker.js
+++ b/docs/assets/scripts/theme-picker.js
@@ -1,34 +1,5 @@
-let initialPageLoadComplete = document.readyState === 'complete';
-
-if (!initialPageLoadComplete) {
-  window.addEventListener('load', () => {
-    initialPageLoadComplete = true;
-  });
-}
-
-// Helper for view transitions
-export function domChange(fn, { behavior = 'smooth', ignoreInitialLoad = true } = {}) {
-  const canUseViewTransitions =
-    document.startViewTransition && !window.matchMedia('(prefers-reduced-motion: reduce)').matches;
-
-  // Skip transitions on initial page load
-  if (!initialPageLoadComplete && ignoreInitialLoad) {
-    fn(false);
-    return null;
-  }
-
-  if (canUseViewTransitions && behavior === 'smooth') {
-    const transition = document.startViewTransition(() => {
-      fn(true);
-      // Wait a brief delay before finishing the transition to prevent jumpiness
-      return new Promise(resolve => setTimeout(resolve, 200));
-    });
-    return transition;
-  } else {
-    fn(false);
-    return null;
-  }
-}
+import { domChange } from './util/dom-change.js';
+export { domChange };
 
 export function nextFrame() {
   return new Promise(resolve => requestAnimationFrame(resolve));
diff --git a/docs/assets/scripts/util/dom-change.js b/docs/assets/scripts/util/dom-change.js
new file mode 100644
index 000000000..48b939e1e
--- /dev/null
+++ b/docs/assets/scripts/util/dom-change.js
@@ -0,0 +1,37 @@
+let initialPageLoadComplete = document.readyState === 'complete';
+
+if (!initialPageLoadComplete) {
+  window.addEventListener('load', () => {
+    initialPageLoadComplete = true;
+  });
+}
+
+/**
+ * Helper for performing a DOM change using a view transition, wherever supported and reduced motion is not desired.
+ * @param {function} fn - Function to perform the DOM change. If async, must resolve when the change is complete.
+ * @param {object} [options] - Options for the transition
+ * @param {'smooth' | 'instant'} [options.behavior] - Transition behavior. Defaults to 'smooth'. 'instant' will skip the transition.
+ * @param {boolean} [options.ignoreInitialLoad] - If true, will skip the transition on initial page load. Defaults to true.
+ */
+export function domChange(fn, { behavior = 'smooth', ignoreInitialLoad = true } = {}) {
+  const canUseViewTransitions =
+    document.startViewTransition && !window.matchMedia('(prefers-reduced-motion: reduce)').matches;
+
+  // Skip transitions on initial page load
+  if (!initialPageLoadComplete && ignoreInitialLoad) {
+    fn(false);
+    return null;
+  }
+
+  if (canUseViewTransitions && behavior === 'smooth') {
+    const transition = document.startViewTransition(() => {
+      fn(true);
+      // Wait a brief delay before finishing the transition to prevent jumpiness
+      return new Promise(resolve => setTimeout(resolve, 200));
+    });
+    return transition;
+  } else {
+    fn(false);
+    return null;
+  }
+}