diff --git a/scripts/helper.js b/scripts/helper.js
index 471e0b7ba6..553706530e 100644
--- a/scripts/helper.js
+++ b/scripts/helper.js
@@ -249,6 +249,12 @@ helper.filterGroup = function (groupTitle) {
   return groupTitle
 }
 
+helper.sleep = function (ms) {
+  return function (x) {
+    return new Promise(resolve => setTimeout(() => resolve(x), ms))
+  }
+}
+
 class Playlist {
   constructor(data) {
     this.header = data.header