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Error: fileName - JavaScript | MDN
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Error: fileName

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

The fileName data property of an Error instance contains the path to the file that raised this error.

In this article

Value

A string.

Property attributes of Error: fileName
Writableyes
Enumerableno
Configurableyes

Description

This non-standard property contains the path to the file that raised this error. If called from a debugger context, the Firefox Developer Tools for example, "debugger eval code" is returned.

Examples

Using fileName

js
const e = new Error("Could not parse input");
throw e;
// e.fileName could look like "file:///C:/example.html"

Specifications

Not part of any standard.

Browser compatibility

See also

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This page was last modified on Jul 10, 2025 by MDN contributors.

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  1. Standard built-in objects
  2. Error
  3. Constructor
    1. Error()
  4. Static methods
    1. captureStackTrace()
    2. isError()
  5. Static properties
    1. stackTraceLimit
  6. Instance methods
    1. toString()
  7. Instance properties
    1. cause
    2. columnNumber
    3. fileName
    4. lineNumber
    5. message
    6. name
    7. stack
  8. Inheritance
  9. Object/Function
  10. Static methods
    1. apply()
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  11. Static properties
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  12. Instance methods
    1. __defineGetter__()
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    3. __lookupGetter__()
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    5. hasOwnProperty()
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    8. toLocaleString()
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    10. valueOf()
  13. Instance properties
    1. __proto__
    2. constructor
  14. Related pages
  15. AggregateError
  16. EvalError
  17. InternalError
  18. RangeError
  19. ReferenceError
  20. SyntaxError
  21. TypeError
  22. URIError
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