Limited Availability JavaScript

Error.isError()

The Error.isError() static method checks whether a value is an Error object.

Baseline Status: This feature is currently Limited (not yet Baseline). Latest engine implementation shipped on Apr 29, 2025.

Desktop Browser Engine Support

Google Chrome

134

Supported

Mozilla Firefox

138

Supported

Apple Safari

—

Unsupported

Microsoft Edge

134

Supported

Mobile Browser Engine Support

Chrome Android

134

Firefox Android

138

Safari iOS

—

Specifications and References

MDN Browser Compat Data Keys: