Error: lineNumber

{{Non-standard_Header}}

The lineNumber data property of an {{jsxref("Error")}} instance contains the line number in the file that raised this error.

Value#

A positive integer.

{{js_property_attributes(1, 0, 1)}}

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#

{{Compat}}

See also#

• {{jsxref("Error.prototype.stack")}}
• {{jsxref("Error.prototype.columnNumber")}}
• {{jsxref("Error.prototype.fileName")}}