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
js
try {
throw new Error("Could not parse input");
} catch (err) {
console.log(err.lineNumber); // 2
}
Alternative example using error event
js
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.