Snippet format update

To match the starter (for the migration)
2019-08-13 10:29:12 +03:00
parent a5164f392a
commit 611729214a
381 changed files with 1951 additions and 1989 deletions
--- a/snippets/isUndefined.md
+++ b/snippets/isUndefined.md
@ -1,4 +1,7 @@
-### isUndefined
+---
+title: isUndefined
+tags: type,beginner
+---

 Returns `true` if the specified value is `undefined`, `false` otherwise.

@ -10,4 +13,4 @@ const isUndefined = val => val === undefined;

 ```js
 isUndefined(undefined); // true
-```
+```