How Can I Efficiently Handle Big Numbers (BigNums) in JavaScript?

Handling Big Numbers in JavaScript (BigNum): Standard Solution

The need to manage large numbers (BigNum) often arises in programming tasks. In JavaScript, there are several options available:

Built-in BigNum

As of 2019, both Firefox and Chrome have implemented the BigInt data type. This native solution provides efficient handling of large integer values without relying on external libraries or Java integrations.

const bigInt1 = 1111111111111111111111111111111n;
const bigInt2 = BigInt("1111111111111111111111111111111")
console.log((bigInt1 + bigInt2)+"")

External Libraries

Prior to the introduction of BigInt, external libraries like the ones mentioned in the question were the go-to solution for handling BigNum. Loading a library requires including a script tag and may be subject to security warnings or performance penalties.

Example with JavaScript BigInt Library:

<script type="text/javascript" src="the_bignum_library.js"></script>
const a = new BigNum("123456789123456789");
const b = new BigNum("987654321987654321");
console.log(a.add(b).toString());

Java Integration

Incorporating a Java BigNum library like apfloat is another option, but it involves a more complex setup and is not commonly used in JavaScript development.

In summary, the native BigInt data type is the recommended and most efficient solution for handling BigNum in JavaScript. External libraries may still be required for older browsers or specific use cases.

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