Djjanks commented on issue #298:
URL: https://github.com/apache/arrow-js/issues/298#issuecomment-3370074112
There are no default codecs automatically registered. Users have to
explicitly register their own compression codecs if they need.
**Regarding the current implementation:**
1. **Codec Registration**: Users need to manually register compression
codecs using `compressionRegistry.set()`. The code you saw in tests
(`registerCompressionCodecs`) is indeed just for testing purposes and serves as
an example that users can adapt.
2. **Error Handling Logic:**
- When users register a codec with encoder, we validate it by checking the
magic number, message length, and structure compressed data
- Errors will only be thrown when users attempt to:
- Write compressed data without a registered codec
- Read compressed data without the appropriate codec available
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