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JS
JavaScript error

SyntaxError

The JavaScript exception "tagged template cannot be used with optional chain" occurs when the tag expression of a tagged template literal is an optional chain, or if there's an optional chain between the tag and the template.

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: Invalid tagged template on optional chain (V8-based)
As listed by MDN Web Docs
SyntaxError: tagged template cannot be used with optional chain (Firefox)
As listed by MDN Web Docs
SyntaxError: Cannot use tagged templates in an optional chain. (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.