diff --git a/snippets/mask.md b/snippets/mask.md
index d7eec0417..46d31bbad 100644
--- a/snippets/mask.md
+++ b/snippets/mask.md
@@ -2,14 +2,12 @@
 
 Replaces all but the last `num` of characters with the specified mask character.
 
-Use `String.slice()` to grab the portion of the characters that need to be masked and use `String.replace()` with a regexp to replace every character with the mask character.
-Concatenate the masked characters with the remaining unmasked portion of the string.
+Use `String.slice()` to grab the portion of the characters that will remain unmasked and use `String.padStart()` to fill the beginning of the string with the mask character up to the original length.
 Omit the second argument, `num`, to keep a default of `4` characters unmasked. If `num` is negative, the unmasked characters will be at the start of the string.
 Omit the third argument, `mask`, to use a default character of `'*'` for the mask.
 
 ```js
-const mask = (cc, num = 4, mask = '*') =>
-  ('' + cc).slice(0, -num).replace(/./g, mask) + ('' + cc).slice(-num);
+const mask = (cc, num = 4, mask = '*') => `${cc}`.slice(-num).padStart(`${cc}`.length, mask);
 ```
 
 ```js
diff --git a/test/mask/mask.js b/test/mask/mask.js
index 8f3b55140..92709f034 100644
--- a/test/mask/mask.js
+++ b/test/mask/mask.js
@@ -1,3 +1,3 @@
 const mask = (cc, num = 4, mask = '*') =>
-  ('' + cc).slice(0, -num).replace(/./g, mask) + ('' + cc).slice(-num);
+  ('' + cc).slice(-num).padStart(('' + cc).length, mask);
 module.exports = mask;