fix(eslint-plugin): [no-unnecessary-type-conversion] ignore enum members #11490
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #11490 +/- ##
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Coverage 90.90% 90.90%
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Branches 8441 8445 +4
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bradzacher
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/home/runner/work/typescript-eslint/typescript-eslint/packages/eslint-plugin/src/rules/no-unnecessary-type-conversion.ts
27:12 error Unnecessary conditional, expected left-hand side of `??` operator to be possibly null or undefined @typescript-eslint/no-unnecessary-condition
27:12 error Do not use Type.symbol because it is poorly typed. Use Type.getSymbol() instead @typescript-eslint/internal/no-poorly-typed-ts-props
27:23 error Unnecessary optional chain on a non-nullish value @typescript-eslint/no-unnecessary-condition
there are some lint errors to fix
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@bradzacher Thanks for the review. I have pushed some changes to fix that |
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should the same fix be applied in |
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@bradzacher Could you please take a look at this PR when you have a chance? Thanks! |
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@skondrashov if you've got a repro, we'd happily take an issue. |
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| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.43.0 | 8.44.0 | | npm | @typescript-eslint/parser | 8.43.0 | 8.44.0 | ## [v8.44.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8440-2025-09-15) ##### 🚀 Features - **eslint-plugin:** \[await-thenable] report invalid (non-promise) values passed to promise aggregator methods ([#11267](typescript-eslint/typescript-eslint#11267)) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-type-conversion] ignore enum members ([#11490](typescript-eslint/typescript-eslint#11490)) ##### ❤️ Thank You - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Ronen Amiel You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.
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| datasource | package | from | to | | ---------- | -------------------------------- | ------ | ------ | | npm | @typescript-eslint/eslint-plugin | 8.43.0 | 8.44.0 | | npm | @typescript-eslint/parser | 8.43.0 | 8.44.0 | ## [v8.44.0](https://github.com/typescript-eslint/typescript-eslint/blob/HEAD/packages/eslint-plugin/CHANGELOG.md#8440-2025-09-15) ##### 🚀 Features - **eslint-plugin:** \[await-thenable] report invalid (non-promise) values passed to promise aggregator methods ([#11267](typescript-eslint/typescript-eslint#11267)) ##### 🩹 Fixes - **eslint-plugin:** \[no-unnecessary-type-conversion] ignore enum members ([#11490](typescript-eslint/typescript-eslint#11490)) ##### ❤️ Thank You - Moses Odutusin [@thebolarin](https://github.com/thebolarin) - Ronen Amiel You can read about our [versioning strategy](https://typescript-eslint.io/users/versioning) and [releases](https://typescript-eslint.io/users/releases) on our website.
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PR Checklist
Overview
The
no-unnecessary-type-conversionrule was incorrectly reporting violations when.toString()was called on enum members. While enums may be string-like or number-like under the hood, they are conceptually opaque types in TypeScript.The rule now skips reporting for enum types and enum members by checking their type and symbol flags. This prevents false positives where calling .toString() is valid and sometimes necessary, and avoids conflicts with no-unsafe-enum-comparison