Comment by georgemandis

The language handled it fine. It will generally just show replacement characters (�) for combos that don't map to anything.

It was really `encodeURIComponent` that didn't handle it gracefully.

If you just type this into the console (surrogate pair for cowboy smiley face emoji), you see it encodes it ("%F0%9F%A4%A0"):

encodeURIComponent("\uD83E\uDD20")

If you give it an invalid surrogate pair, it will throw an actual error:

encodeURIComponent("\uDD20\uD83E")