类型错误：无法将 BigInt 转换为数字

¥Message

TypeError: Cannot convert a BigInt value to a number (V8-based)
TypeError: Cannot mix BigInt and other types, use explicit conversions (V8-based)
TypeError: BigInts have no unsigned right shift, use >> instead (V8-based)
TypeError: can't convert BigInt to number (Firefox)
TypeError: Conversion from 'BigInt' to 'number' is not allowed. (Safari)
TypeError: Invalid mix of BigInt and other type in addition/multiplication/…. (Safari)
TypeError: BigInt does not support >>> operator (Safari)

¥Error type

TypeError。

¥What went wrong?

算术运算符的两侧必须都是 BigInt，或者都不是。如果运算涉及 BigInt 和数字的混合，则结果应该是 BigInt 还是数字是不明确的，因为在这两种情况下都可能会损失精度。

¥The two sides of an arithmetic operator must both be BigInts or both not. If an operation involves a mix of BigInts and numbers, it's ambiguous whether the result should be a BigInt or number, since there may be loss of precision in both cases.

当 BigInt 通过 数字强制 过程隐式转换为数字时，也会发生错误。例如，如果将 BigInt 传递给需要数字的内置方法。

¥The error also happens when a BigInt is implicitly converted to a number via the number coercion process. For example, if a BigInt is passed to a built-in method that expects a number.

如果在两个 BigInt 之间使用 无符号右移运算符 (>>>)，也可能会发生该错误。在 Firefox 中，消息是相同的："无法将 BigInt 转换为数字"。

¥The error can also happen if the unsigned right shift operator (>>>) is used between two BigInts. In Firefox, the message is the same: "can't convert BigInt to number".

¥Examples

¥Mixing numbers and BigInts in operations

const sum = 1n + 1;
// TypeError: can't convert BigInt to number

相反，显式地将一侧强制为 BigInt 或数字。

¥Instead, explicitly coerce one side to a BigInt or number.

const sum = 1n + BigInt(1);
const sum2 = Number(1n) + 1;

¥Using unsigned right shift on BigInts

const a = 4n >>> 2n;
// TypeError: can't convert BigInt to number

请改用正常的右移。

¥Use normal right shift instead.

const a = 4n >> 2n;

¥See also

• BigInt