diff --git a/src/utils.ts b/src/utils.ts
index b4430e1..a495ddc 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -88,4 +88,8 @@ export function getReactInstance(o: HTMLElement | Element | Node) {
 
 export function joinClassNames(...classes: string[]): string {
     return classes.join(" ");
+}
+
+export function sleep(ms: number) {
+    return new Promise(res => setTimeout(res, ms));
 }
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