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