JS BigInt.asIntN()
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本文目录结构
The BigInt.asIntN static method is used to wrap a BigInt value to a signed integer between -2width-1 and 2width-1-1.
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Syntax
BigInt.asIntN(width, bigint);
Parameters
width
The amount of bits available for the integer size.
bigint
The integer to clamp to fit into the supplied bits.
Returns
The value of bigint modulo 2width as a signed integer.
Examples
Staying in 64-bit ranges
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);
// ↪ -9223372036854775807n
// negative because of overflow
Specifications
| Specification | Status |
|---|---|
| BigInt proposal | Stage 3 |
