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Error: lineNumber

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 lineNumber data property of an Error instance contains the line number in the file that raised this error.

Value

A positive integer.

Property attributes of `Error: lineNumber`
Writable	yes
Enumerable	no
Configurable	yes

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	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet	WebView Android	WebView on iOS	Bun	Deno	Node.js
`lineNumber`	No	No	1	No	No	No	4	No	No	No	No	No	?	No	No