For fixed-width numbers, it's not really a range it's a set. If I do parseFloat("1e-9999") I expect the result to be 0, and maybe there is a flag or additional

For fixed-width numbers, it's not really a range it's a set. If I do parseFloat("1e-9999") I expect the result to be 0, and maybe there is a flag or additional return value saying it's approximate.