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JavaScript error

SyntaxError

The JavaScript exception "mismatched placement" occurs when a private getter and setter are mismatched in whether or not they are static.

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: Identifier '#x' has already been declared (V8-based)
As listed by MDN Web Docs
SyntaxError: getter and setter for private name #x should either be both static or non-static (Firefox)
As listed by MDN Web Docs
SyntaxError: Cannot declare a private non-static getter if there is a static private setter with used name. (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 2026-09-25T01:48:37.273Z.