refactor: format and lint codebase (#971)

app/assets/javascripts/Hooks/useBeforeUnload.tsx

@@ -0,0 +1,11 @@
+import { useEffect } from '@node_modules/preact/hooks'
+
+export const useBeforeUnload = (): void => {
+  useEffect(() => {
+    window.onbeforeunload = () => true
+
+    return () => {
+      window.onbeforeunload = null
+    }
+  }, [])
+}