feat(curriculum): Add interactive examples to How Can You Extract a Substring from a String lesson (#63202)

curriculum/challenges/english/blocks/lecture-working-with-string-search-and-slice-methods/67326c15b3b2f0c5827927cc.md

@@ -5,7 +5,7 @@ challengeType: 19
 dashedName: how-can-you-extract-a-substring-from-a-string
 ---
 
-# --description--
+# --interactive--
 
 When working with strings in JavaScript, you often need to extract a portion or substring from a larger string.
 
@@ -25,46 +25,62 @@ string.slice(startIndex, endIndex);
 
 Let's look at a simple example of extracting part of a string:
 
+:::interactive_editor
+
 ```js
 let message = "Hello, world!";
 let greeting = message.slice(0, 5);
 
-console.log(greeting);  // Output: Hello
+console.log(greeting);  // Hello
 ```
 
+:::
+
 In this example, `slice(0, 5)` extracts characters starting from index `0` up to but not including index `5`. As a result, the word `Hello` is extracted.
 
 If you omit the second parameter, `slice()` will extract everything from the start index to the end of the string:
 
+:::interactive_editor
+
 ```js
 let message = "Hello, world!";
 let world = message.slice(7);
 
-console.log(world);  // Output: world!
+console.log(world);  // world!
 ```
 
+:::
+
 Here, `slice(7)` extracts the string from index `7` to the end of the string, resulting in `world!`.
 
 You can also use negative numbers as indexes. When you use a negative number, it counts backward from the end of the string:
 
+:::interactive_editor
+
 ```js
 let message = "JavaScript is fun!";
 let lastWord = message.slice(-4);
 
-console.log(lastWord);  // Output: fun!
+console.log(lastWord);  // fun!
 ```
 
+:::
+
 In this case, `slice(-4)` extracts the last four characters from the string, giving us `fun!`.
 
 Let's say you want to extract a section from the middle of a string. You can provide both the starting and ending indexes to precisely control which part of the string you want:
 
+:::interactive_editor
+
 ```js
 let message = "I love JavaScript!";
 let language = message.slice(7, 17);
 
-console.log(language);  // Output: JavaScript
+console.log(language);  // JavaScript
 ```
 
+:::
+
 Here, `slice(7, 17)` extracts the substring starting at index 7 and ending right before index `17`, which is the word `JavaScript`.
 
 The `slice()` method is a powerful tool for extracting parts of a string in JavaScript.