Merge pull request #439 from kriadmin/patch-2

Update isValidJSON.md

snippets/isValidJSON.md

@@ -2,14 +2,14 @@
 
 Checks if the provided argument is a valid JSON.
 
-Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON.
+Use `JSON.parse()` and a `try... catch` block to check if the provided argument is a valid JSON and non-null.
 
 ```js
 const isValidJSON = obj => {
   try {
     JSON.parse(obj);
-    return true;
-  } catch (e) {
+    return !!obj;
+} catch (e) {
     return false;
   }
 };