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JS
JavaScript error

SyntaxError

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.

Reference entryJavaScriptFetched
This is a reference entry from MDN Web Docs. A full explanation with fixes has not been written yet.

The error messages

SyntaxError: Cannot convert x to a BigInt (V8-based)
As listed by MDN Web Docs
SyntaxError: invalid BigInt syntax (Firefox)
As listed by MDN Web Docs
SyntaxError: Failed to parse String to BigInt (Safari)
As listed by MDN Web Docs

Details

Category
SyntaxError
Severity
error
Runtime
both

Related errors

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Source: MDN Web Docs. Data fetched 2026-09-25T01:48:37.274Z.