unicorn/prefer-bigint-literals

BigInt(123) and BigInt("123") call a function to make a value you can write as 123n. With a large number, the call is also wrong. BigInt(9007199254740993) rounds the number before BigInt sees it, so you get 9007199254740992n.

--fix replaces the call with the literal.

Configure

Off by default. To turn it on:

[lint.rules]
"unicorn/prefer-bigint-literals" = "error" # or "warn"

Examples

Reported:

const zero = BigInt(0);
const limit = BigInt("9007199254740993");
const mask = BigInt(0xFF);

Not reported:

const zero = 0n;
const limit = 9007199254740993n;
const mask = 0xFFn;

A value that's only known at runtime still needs the call:

const id = BigInt(row.id);
const size = BigInt(`${count}000`);