SyntaxError: Failed to execute 'appendChild' on 'Node': Unexpected identifier 'as'
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- Dominant language
- Ruby
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Description
## Error
```
Failed to execute 'appendChild' on 'Node': Unexpected identifier 'as'
```
## Stack trace
```
:1
:1
```
## Tracking Details
- **Project**: exercism-js
- **Sentry**: [SyntaxError: Failed to execute 'appendChild' on 'Node': Unexpected identifier 'as'](https://thalamus-ai.sentry.io/issues/124248908/)
- **Culprit**: ?()
- **First seen:** Jun 1, 2026
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