JS doesn't have integer, but its Number is really just a double, which has a 52 bit mantissa, meaning it can hold any 8, 16 or 32 bit integer. Only 64 bit integ

JS doesn't have integer, but its Number is really just a double, which has a 52 bit mantissa, meaning it can hold any 8, 16 or 32 bit integer. Only 64 bit integers are unable to be stored in a double, which is why the WASM->JS interface doesn't allow them.