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JavaScript could not convert a non-integer value to BigInt

RangeError: x can't be converted to BigInt because it isn't an integer

JavaScript rejected a conversion to BigInt because the source numeric value is not an integer.

RangeError: x can't be converted to BigInt because it isn't an integerruntime

Observed message

RangeError: x can't be converted to BigInt because it isn't an integer

Why it happens

  • A decimal number is being converted to BigInt.
  • Parsed or computed numeric input contains a fractional component.
  • Type conversion assumptions ignore BigInt's integer-only rules.

How to fix it

  1. Convert only integers to BigInt.
  2. Round, floor, or reject decimal values before conversion as appropriate.
  3. Validate parsed numeric input before calling BigInt or related APIs.

Official reference

MDN: RangeError: x can't be converted to BigInt because it isn't an integer

Related errors

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