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Support astral symbols #7

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mathiasbynens opened this Issue Jun 24, 2013 · 0 comments

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mathiasbynens commented Jun 24, 2013

E.g.

console.log(ent.decode('© 𝌆'))

© decodes just fine, but 𝌆 doesn’t because String.fromCharCode(0x1D306) doesn’t work for astral values (i.e. values > 0xFFFF). U+1D306 (𝌆) is an astral symbol. Details here: http://mathiasbynens.be/notes/javascript-encoding

This can easily be fixed by using the Punycode module:

// Instead of…
String.fromCharCode(codePoint);
// …which only works for values from 0x0000 to 0xFFFF, use this:
punycode.ucs2.encode([ codePoint ]);
// …which works for all Unicode code points (i.e. values from 0x000000 to 0x10FFFF)

(Note: Punycode.js is bundled with Node.js v0.6.2+ but you could always add it to package.json anyway if you want to support older versions).

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