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Exception references with exnref (WebAssembly)

Limited availability

When caught, an exception is reified into an exception reference, a value of the new type exnref.

Browser support

  • Chrome 137 Released on 2025-05-27
  • Chrome Android 137 Released on 2025-05-27
  • Edge Not supported
  • Firefox 131 Released on 2024-10-01
  • Firefox for Android 131 Released on 2024-10-01
  • Safari 18.4 Released on 2025-03-31
  • Safari on iOS 18.4 Released on 2025-03-31

Baseline availability blocked since May 2025 by Chromium (14 months)

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MDN documentation

No MDN documentation found. You can search for the feature on MDN. If you believe that MDN has no documentation about this feature, you can open an issue on MDN's GitHub repository.

Specifications

Usage (according to Chrome Platform Status)

~0.000% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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