How to use five digit long Unicode characters in JavaScript

Question

In JavaScript I can do this:

foo = \"\\u2669\" // 1/4 note

But I can\'t do this

foo = \"\\u1D15D\" // full note  -five hex digi         


        

Answer 1

In the MDN documentation for fromCharCode, they note that javascript will only naturally handle characters up to 0xFFFF. However, they also have an implementation of a fixed method for fromCharCode that may do what you want (reproduced below):

function fixedFromCharCode (codePt) {
    if (codePt > 0xFFFF) {
        codePt -= 0x10000;
        return String.fromCharCode(0xD800 + (codePt >> 10), 0xDC00 + (codePt & 0x3FF));
    }
    else {
        return String.fromCharCode(codePt);
    }
}

foo = fixedFromCharCode(0x1D15D);