feat(curriculum): Add interactive examples to How Does the typeof Operator Work, and What Is the typeof null Bug in JavaScript (#63186)

curriculum/challenges/english/blocks/lecture-working-with-data-types/6732518a8627876f4fcd18a4.md

@@ -5,26 +5,34 @@ challengeType: 19
 dashedName: how-does-the-typeof-operator-work-and-what-is-the-typeof-null-bug-in-javascript
 ---
 
-# --description--
+# --interactive--
 
 The `typeof` operator in JavaScript is a simple yet powerful tool that lets you see the data type of a variable or value. It always returns a string indicating the type.
 
 Let's take a look at a few examples:
 
+:::interactive_editor
+
 ```js
 let num = 42;
 console.log(typeof num); // "number"
 ```
 
+:::
+
 In this first example, we have created a variable called `num` and assigned it the number `42`. When you use the `typeof` operator on the variable named `num`, it will return the string `number`.
 
 Here is another example of using the `typeof` operator on variable called `isUserLoggedIn`:
 
+:::interactive_editor
+
 ```js
 let isUserLoggedIn = true;
 console.log(typeof isUserLoggedIn); // "boolean"
 ```
 
+:::
+
 When you use the `typeof` operator on the `isUserLoggedIn` variable, it will return a string `boolean` because the boolean `true` was assigned to the variable.
 
 Using the `typeof` operator can be especially useful when you're debugging or trying to understand what kind of data you're working with in your code.
@@ -33,11 +41,15 @@ However, there's a well-known quirk in JavaScript when it comes to `null`.
 
 Let's take a look at an example:
 
+:::interactive_editor
+
 ```js
 let exampleVariable = null;
 console.log(typeof exampleVariable); // "object"
 ```
 
+:::
+
 In this example, we have a variable called `exampleVariable` and have assigned it the value of `null`. But when we use the `typeof` operator, it returns the string `object`.
 
 This is widely considered a bug in JavaScript, dating back to its early days. The reason for this behavior is rooted in the way JavaScript was originally designed.