BigInt.asIntN()
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2020.
BigInt.asIntN 静态方法将 BigInt 值转换为一个 -2^(width-1) 与 2^(width-1)-1 之间的有符号整数。
尝试一下
语法
BigInt.asIntN(width, bigint);
参数
返回值
bigint 模 (modulo) 2^width 作为有符号整数的值。
示例
保持在 64 位范围内
BigInt.asIntN() 方法对于保持在 64 位 (64-bit) 算数范围内非常有用。
js
const max = 2n ** (64n - 1n) - 1n;
BigInt.asIntN(64, max);
// ↪ 9223372036854775807n
BigInt.asIntN(64, max + 1n);
// ↪ -9223372036854775808n
// negative because of overflow
规范
| Specification |
|---|
| ECMAScript Language Specification # sec-bigint.asintn |
浏览器兼容性
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