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

You can use this:

function fromOutsideBMP(cp) {
// 0x01D120
  var x=cp-0x10000;
  var top10=parseInt("11111111110000000000",2);
  var end10=parseInt("1111111111",2);
  var part1=(x&top10)/1024+0xD800;
  var part2=(x&end10)+0xDC00;
  var s=String.fromCharCode(part1)+String.fromCharCode(part2);
  return s;
}

Example:

> fromOutsideBMP(0x01d122)
  "