Linter · Rules

@typescript-eslint/no-loss-of-precision

Disallow number literals that cannot be stored exactly as written

A JavaScript number holds 15 to 17 significant digits. A literal that needs more is rounded without a warning, so the program runs with a different number than the one in the source. This often happens with IDs copied from a database.

Use a bigint or a string for a large integer.

This rule is deprecated. Use no-loss-of-precision instead.

Examples

Reported:

const orderId = 9007199254740993; // stored as 9007199254740992
const limit = 2e999; // stored as Infinity

Not reported:

const orderId = 9007199254740993n;
const invoiceId = "9007199254740993";
const rate = 0.3;
const limit = Number.MAX_VALUE;