07_reverseString: handle Unicode surrogate pairs in reverseString solution

07_reverseString/solution/reverseString-solution.js

@@ -1,5 +1,16 @@
 const reverseString = function (string) {
-  return string.split("").reverse().join("");
+  return Array.from(string).reverse().join("");
+
+  /*
+  The following statement: `return string.split("").reverse().join("");`
+  also works but only if the passed string doesn't include any complex Unicode character,
+  i.e. a characher stored in a surrogate pair, which is a pair of 16-bit code units that represents a single character.
+  Example: emojis as in "Great 👍" and some accented characters as in "mañana".
+
+  The `split()` method splits the String by UTF-16 code units and will separate surrogate pairs resulting in invalid characters.
+
+  Search about 'Surrogate Pairs' and 'Grapheme Clusters' for more information.
+  */
 };
 
 module.exports = reverseString;