This JavaScript warning Using //@ to indicate sourceURL pragmas is deprecated. Use //# instead occurs if there is a source map syntax defined in a JavaScript source, Which has been depreciated.
Message:
Warning: SyntaxError: Using //@ to indicate sourceURL pragmas
is deprecated. Use //# instead
Warning: SyntaxError: Using //@ to indicate sourceMappingURL
pragmas is deprecated. Use //# instead
Error Type:
This is a warning that a SyntaxError has occurred. JavaScript execution won't be halted.
Cause of Error: Somewhere in the code, there is a source map syntax used in a JavaScript source, Which is depreciated.
Example 1: In this example, the sourceURL is used with @, Which is depreciated.
HTML
Output:
Warning: SyntaxError: Using //@ to indicate sourceURL
pragmas is deprecated. Use //# instead
Example 2: In this example, the sourceMappingURL is used with @, Which is depreciated.
HTML
Output:
arning: SyntaxError: Using //@ to indicate sourceMappingURL
pragmas is deprecated. Use //# instead
Reference link: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Deprecated_source_map_pragma
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