diff --git a/Libraries/polyfills/String.prototype.es6.js b/Libraries/polyfills/String.prototype.es6.js
index ac46fc873..655513803 100644
--- a/Libraries/polyfills/String.prototype.es6.js
+++ b/Libraries/polyfills/String.prototype.es6.js
@@ -124,3 +124,37 @@ if (!String.prototype.codePointAt) {
     return first;
   };
 }
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padEnd
+if (!String.prototype.padEnd) {
+  String.prototype.padEnd = function padEnd(targetLength, padString) {
+    targetLength = targetLength >> 0; //floor if number or convert non-number to 0;
+    padString = String(typeof padString !== 'undefined' ? padString : ' ');
+    if (this.length > targetLength) {
+      return String(this);
+    } else {
+      targetLength = targetLength - this.length;
+      if (targetLength > padString.length) {
+        padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
+      }
+      return String(this) + padString.slice(0, targetLength);
+    }
+  };
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/padStart
+if (!String.prototype.padStart) {
+  String.prototype.padStart = function padStart(targetLength, padString) {
+    targetLength = targetLength >> 0; //truncate if number or convert non-number to 0;
+    padString = String(typeof padString !== 'undefined' ? padString : ' ');
+    if (this.length > targetLength) {
+      return String(this);
+    } else {
+      targetLength = targetLength - this.length;
+      if (targetLength > padString.length) {
+        padString += padString.repeat(targetLength / padString.length); //append to original to ensure we are longer than needed
+      }
+      return padString.slice(0, targetLength) + String(this);
+    }
+  };
+}