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

undefined

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.