This is a bit pedantic, but JS implementations don't necessarily use UCS-2 as the internal encoding. The issue is that the spec requires characters to be expose

This is a bit pedantic, but JS implementations don't necessarily use UCS-2 as the internal encoding. The issue is that the spec requires characters to be exposed to programs as 16-bit values. See here: http://mathiasbynens.be/notes/javascript-encoding http://mathiasbynens.be/notes/javascript-encoding