Many JavaScript engines use IEEE-754 double-precision floats as their immediate value type, and fit pointers and integer within the NaN payload of the double re

Many JavaScript engines use IEEE-754 double-precision floats as their immediate value type, and fit pointers and integer within the NaN payload of the double representation. See https://wingolog.org/archives/2011/05/18/value-representation-in-javascript-implementations https://wingolog.org/archives/2011/05/18/value-representatio... for a discussion of a few similar approaches and the tradeoffs of each.