SyntaxError: invalid BigInt syntax
The JavaScript exception "invalid BigInt syntax" occurs when a string value is being coerced to a {{jsxref("BigInt")}} but it failed to be parsed as an integer.
Message
SyntaxError: Cannot convert x to a BigInt (V8-based)
SyntaxError: invalid BigInt syntax (Firefox)
SyntaxError: Failed to parse String to BigInt (Safari)
Error type
.
What went wrong?
When using the BigInt() function to convert a string to a BigInt, the string will be parsed in the same way as source code, and the resulting value must be an integer value.
Examples
Invalid cases
const a = BigInt("1.5");
const b = BigInt("1n");
const c = BigInt.asIntN(4, "8n");
// SyntaxError: invalid BigInt syntax
Valid cases
const a = BigInt("1");
const b = BigInt(" 1 ");
const c = BigInt.asIntN(4, "8");