WIPgit status <Compose> Refactor; <Composer> ed.

app/javascript/flavours/glitch/util/dom_helpers.js

@@ -0,0 +1,6 @@
+//  Package imports.
+import detectPassiveEvents from 'detect-passive-events';
+
+//  This will either be a passive lister options object (if passive
+//  events are supported), or `false`.
+export const withPassive = detectPassiveEvents.hasSupport ? { passive: true } : false;