BigInt.asIntN()

The BigInt.asIntN static method clamps a BigInt value to a signed integer value, and returns that value.

bits

The amount of bits available for the integer size.

bigint

The BigInt value to clamp to fit into the supplied bits.

The value of bigint modulo 2^bits, as a signed integer.

The BigInt.asIntN() method can be useful to stay in the range of 64-bit arithmetic.

const max = 2n ** (64n - 1n) - 1n;

BigInt.asIntN(64, max);
// ↪ 9223372036854775807n

BigInt.asIntN(64, max + 1n);
// ↪ -9223372036854775808n
// negative because of overflow

• BigInt
• BigInt.asUintN()