How can I convert a string into a unicode character?

Question

In Javascript \'\\uXXXX\' returns in a unicode character. But how can I get a unicode character when the XXXX part is a variable?

For example:<

Answer 1

JavaScript uses UCS-2 internally.

Thus, String.fromCharCode(codePoint) won’t work for supplementary Unicode characters. If codePoint is 119558 (0x1D306, for the '