The JavaScript exception "invalid BigInt syntax" occurs when a string value is being coerced to a BigInt but it failed to be parsed as an integer.
The JavaScript exception "invalid BigInt syntax" occurs when a string value is being coerced to a BigInt but it failed to be parsed as an integer.
SyntaxError: Cannot convert x to a BigInt (V8-based) SyntaxError: invalid BigInt syntax (Firefox) SyntaxError: Failed to parse String to BigInt (Safari)
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.
const a = BigInt("1.5"); const b = BigInt("1n"); const c = BigInt.asIntN(4, "8n"); // SyntaxError: invalid BigInt syntax
const a = BigInt("1"); const b = BigInt(" 1 "); const c = BigInt.asIntN(4, "8");
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https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_BigInt_syntax