Why doesn't the dart2js compiler convert 64-bit integers to IEEE 754 FP numbers?

Question

I've been reading that the dart2js compiler doesn't support 64 bit integers. Is this because javascript doesn't have a representation for 64-bit integers and stores all numbers as 64-bit double precision values? If so, couldn't integer values simply be converted to the representation? If that is not the case, why doesn't the compiler support this conversion?

Answer 1

Yes, this is because JS doesn't have 64 int. I'm not sure what you mean by the rest of your question. If you store bigger values as double, you loose precision.