# todo - cleanup codebase - better error reporting and stack traces in strict mode - auto-enable of strict mode depending on compiler optimizaton level - check smoothness of spring at high frequency updates - implement from solid - [x] onCleanup > `cleanup()` - [x] Index > `indexes()` - [x] For > `values()` - [ ] untrack - [ ] batch - [ ] async/resource/loading/suspense - [ ] stores