Handle astral Unicode symbols

[fb55]

Probably the same way mathiasbynens/he does it.

[mathiasbynens]

FYI, if you only care about supporting Node, it’s even easier: you can use the built-in punycode module to convert the numeric code point value into the correct symbol.

var punycode = require('punycode'); // no need to `npm install`; it ships with Node
punycode.ucs2.encode([0x1D306]); // returns a string containing only U+1D306 TETRAGRAM FOR CENTRE, i.e. `'𝌆'`

[fb55]

That's really neat, thanks! I'll probably implement it myself anyways, for performance reasons, but there were already plenty of cases were I wished I had something like that :)

[mathiasbynens]

http://mathiasbynens.be/notes/javascript-encoding#surrogate-formulae may be helpful.