JavaScript Snippet

Reverse a String Safely

Difficulty: Easy

Reversing a string is the textbook one-liner, but the obvious version `[...str].reverse().join('')` corrupts emoji families, flag sequences, and any character with combining marks. This snippet starts with the naive UTF-16 reverse, upgrades to a code-point reverse that fixes surrogate pairs, and ends with `Intl.Segmenter` for true grapheme-cluster correctness. Pick the version that matches the worst-case input you actually expect.