Web features explorer

Error.isError()

Limited availability

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

Browser support

  • Chrome 134 Released on 2025-03-04
  • Chrome Android 134 Released on 2025-03-04
  • Edge 134 Released on 2025-03-06
  • Firefox 138 Released on 2025-04-29
  • Firefox for Android 138 Released on 2025-04-29
  • Safari Not supported
  • Safari on iOS Not supported

Baseline availability blocked since April 2025 by Safari (15 months)

👍
14

Need this feature?
Leave a 👍 on the feedback issue
Don't forget to also leave a comment explaining your specific use case.

MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~1.627% of page loads. More data at chromestatus.com.

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist