**Core concept (TL;DR).** BigInt is a primitive for **arbitrary-precision integers** — whole numbers larger than Number can safely hold. Regular numbers are 64-bit floats and lose precision past Number.MAX_SAFE_INTEGER (2⁵³−1); BigInt has no such limit. Create one with an n suffix ( 10n ) or BigInt(10) . Past 2⁵³−1, Number loses precision; BigInt doesn't <text x="135" y="64" fill="#ef4444" font-size="11" font-weight="700

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What is BigInt?

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bigint

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JSPrecision past MAX_SAFE_INTEGER

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