supplementary plane optimazation

[Clayblockunova]

currently, supplementary plane characters like emojis are escaped into 2 surrogate characters. But current JS have alternate methods to treat supplementary plane characters as single character, i.e. String.fromCodePoint(), decodeURI() (like unescape() but treat standard UTF8 better) and \u{XXXXXX}(alternate Escape sequence). when will those be supported?

[fasttime]

That's a good point. I was planning to work on number encoding (#9) first, since that alone would improve the length of many character encodings even in the BMP character range, but I haven't been very active here lately. The optimization you describe is probably simpler and can be done first.

[fasttime]

This is now implemented in JScrewIt 2.28.