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JS
JavaScript error

SyntaxError

The JavaScript warning "Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead" occurs when there is a deprecated source map syntax in a JavaScript source.

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

The error messages

Warning: SyntaxError: Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead
As listed by MDN Web Docs
Warning: SyntaxError: Using //@ to indicate sourceMappingURL pragmas is deprecated. Use //# instead
As listed by MDN Web Docs

Details

Category
A warning that a SyntaxError occurred. JavaScript execution won't be halted
Severity
error
Runtime
both

Related errors

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Source: MDN Web Docs. Data fetched 2026-09-25T01:48:37.273Z.