Loses precision when cast to native BigInt

[bwhrsc]

const BigInteger = require ('big-integer');

const bigInteger = BigInteger (98431810442228979385391258349711259686n);
const bigInt = BigInt (bigInteger);

console.log (bigInteger);
console.log (bigInt);

Output:

Integer { value: 98431810442228979385391258349711259686n }
98431810442228974157521554495426789376n

Environment:

• Node 10.21.0

[bwhrsc]

Workaround:

const bigIntFromString = BigInt (bigInteger.toString());

[peterolson]

You'll have to use the workaround because the .valueOf function of BigInt returns a JavaScript number, which removes precision. If you want to maintain precision you need to convert it to a string first.