{"id":15538941,"url":"https://github.com/buschtoens/unsupported-value-error","last_synced_at":"2026-01-08T03:16:31.404Z","repository":{"id":36960720,"uuid":"253765477","full_name":"buschtoens/unsupported-value-error","owner":"buschtoens","description":"Utility Error class for performing exhaustiveness checks via exceptions in 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unsupported-value-error\n\n[![CI](https://github.com/buschtoens/unsupported-value-error/workflows/CI/badge.svg)](https://github.com/buschtoens/unsupported-value-error/actions)\n[![npm version](https://badge.fury.io/js/unsupported-value-error.svg)](http://badge.fury.io/js/unsupported-value-error)\n[![Download Total](https://img.shields.io/npm/dt/unsupported-value-error.svg)](http://badge.fury.io/js/unsupported-value-error)\n[![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)  \n[![Dependabot enabled](https://img.shields.io/badge/dependabot-enabled-blue.svg?logo=dependabot)](https://dependabot.com/)\n[![dependencies Status](https://david-dm.org/buschtoens/unsupported-value-error/status.svg)](https://david-dm.org/buschtoens/unsupported-value-error)\n[![devDependencies Status](https://david-dm.org/buschtoens/unsupported-value-error/dev-status.svg)](https://david-dm.org/buschtoens/unsupported-value-error?type=dev)\n\nLittle TypeScript utility Error class for performing exhaustiveness checks via\nexceptions, based on [this post by Dr. Axel Rauschmayer][blog-post].\n\n[blog-post]: https://2ality.com/2020/02/typescript-exhaustiveness-checks-via-exceptions.html\n\n```ts\nenum NoYes {\n  No = 'no',\n  Yes = 'yes'\n}\n\nfunction toGerman(x: NoYes) {\n  switch (x) {\n    case NoYes.No: return 'Nein';\n    // case NoYes.Yes: return 'Ja';\n    default: throw new UnsupportedValueError(x);\n    // =\u003e TS2345: Static TS error: Argument of type 'NoYes.Yes' is not assignable to parameter of type 'never'.\n    // =\u003e Runtime: Unsupported value: 'yes'\n  }\n}\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fbuschtoens%2Funsupported-value-error","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fbuschtoens%2Funsupported-value-error","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fbuschtoens%2Funsupported-value-error/lists"}