如何在JavaScript中将字符串转换为bigint [英] How to convert strings to bigint in JavaScript

问题描述

我需要在Javascript中将字符串转换为bigint，如 BigInteger

I need to convert a string to bigint like BigInteger in Javascript

示例

var reqId = "78099864177253771992779766288266836166272662";
var result = parseInt(reqId);
document.write(result);

结果值不匹配，因为JavaScript允许整数最多为2 ^ 53。

Resultant value not matching since JavaScript allows integers up to 2^53.

有没有办法克服这个问题？

Is there any way to overcome this?

推荐答案

BigInt 现在是原生JavaScript语言功能。它位于TC39流程的第3阶段，它在V8 v6.7和Chrome 67中发布。

BigInt is now a native JavaScript language feature. It's at Stage 3 in the TC39 process and it's shipping in V8 v6.7 and Chrome 67.

将包含有效数字文字的字符串转换为 BigInt ，使用全局 BigInt 函数：

To turn a string containing a valid numeric literal into a BigInt, use the global BigInt function:

const string = '78099864177253771992779766288266836166272662';
BigInt(string);
// 78099864177253771992779766288266836166272662n

如果您只想将数值硬编码到代码中，那么不需要从字符串转换;改为使用 BigInt 字面值：

If you just want to hardcode the numeric value into your code, there is no need to convert from a string; use a BigInt literal instead:

const value = 78099864177253771992779766288266836166272662n;

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