Summary & Key Takeaways ​

• Introduces configureClientErrors({ onError }) for comprehensive client-side error monitoring.
• Provides a dedicated seam for applications or error monitors to catch otherwise unhandled component failures.
• Moves delegated event handlers off Solid 1's $$<type> key to _$$<type> to prevent conflicts with older runtimes.
• Ensures compatibility and isolation when multiple Solid versions coexist on a single page.
• The error hook machinery is pay-for-use, only included if createErrorBoundary or configureClientErrors are imported.

Our Commentary ​

We're seeing SolidJS 2.0 really mature in its release candidate phase. The new client error hook is a big deal for robust applications; it's the kind of foundational improvement that makes debugging less of a nightmare. And that event delegation fix? I've seen enough weird conflicts with embedded widgets to know that's a welcome change. It's all about stability and making sure things just work.