W3cubDocs

/JavaScript

Error.prototype.lineNumber

Non-standard: This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The lineNumber property contains the line number in the file that raised this error.

Examples

Using lineNumber

try {
  throw new Error('Could not parse input');
} catch (err) {
  console.log(err.lineNumber) // 2
}

Alternative example using error event

window.addEventListener('error', (e) => {
  console.log(e.lineNumber); // 5
});
const e = new Error('Could not parse input');
throw e;

This is not a standard feature and lacks widespread support. See the browser compatibility table below.

Specifications

Not part of any standard.

Browser compatibility

Desktop Mobile Server
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet Deno Node.js
lineNumber
No
No
1
No
No
No
No
No
4
No
No
No
No
No

See also

© 2005–2022 MDN contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error/lineNumber