diff --git a/src/polyfill/string.js b/src/polyfill/string.js
index 4e2e19c59c4..085605e76cd 100644
--- a/src/polyfill/string.js
+++ b/src/polyfill/string.js
@@ -1,7 +1,7 @@
 import { defineProtoFunc } from "./defineProtoFunc.js";
 
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith#Polyfill
-defineProtoFunc(String, 'endsWith', function(search, this_len) {
+defineProtoFunc(String, 'endsWith', function (search, this_len) {
     if (this_len === undefined || this_len > this.length) {
         this_len = this.length;
     }
@@ -9,7 +9,7 @@ defineProtoFunc(String, 'endsWith', function(search, this_len) {
 });
 
 // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes#Polyfill
-defineProtoFunc(String, 'includes', function(search, start) {
+defineProtoFunc(String, 'includes', function (search, start) {
     'use strict';
     if (typeof start !== 'number') {
         start = 0;
@@ -27,3 +27,8 @@ defineProtoFunc(String, 'startsWith', function(search, rawPos) {
     var pos = rawPos > 0 ? rawPos|0 : 0;
     return this.substring(pos, pos + search.length) === search;
 });
+
+// https://vanillajstoolkit.com/polyfills/stringtrimend/
+defineProtoFunc(String, 'trimEnd', function () {
+    return this.replace(new RegExp(/[\x09\x0A\x0B\x0C\x0D\x20\xA0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF]+/.source + '$', 'g'), '');
+});