Fix: Construct 3 Array AsJSON Encoding Breaks on Emoji

Quick answer: Construct 3 Array.AsJSON producing invalid JSON when values contain emoji? UTF-16 surrogate pairs not escaped properly - sanitize before serialize or use a custom encoder.

Chat log saved via Array.AsJSON. After a message with emoji, the file fails to parse.

Strip non-BMP chars

Pre-sanitize: remove characters above U+FFFF (4-byte UTF-8). Loses emoji; saves the JSON.

Or escape via JS

JSON.stringify(value)

The runtime's JSON.stringify handles surrogate pairs correctly. Bypass Construct's encoder for emoji-rich strings.

Test with a chat sample

Sample text with mixed scripts and emoji. Round-trip through your save system; verify integrity.

“Construct 3's JSON encoder predates emoji prevalence. Modern strings need a modern encoder.”

If your game persists user text, test with international characters. Latin-only tests miss a lot.