#no-unsafe-enum-comparison

#Configuration

import { defineConfig, ts } from '@rslint/core';

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/no-unsafe-enum-comparison': 'error',
    },
  },
]);

#Rule Details

Disallow comparing an enum value with a non-enum value.

TypeScript enums are a special type that represent a set of named constants. Comparing enum values against raw literals or values of a different enum type is often a mistake and can lead to subtle bugs, since enums in TypeScript have their own type identity.

Examples of incorrect code for this rule:

enum Fruit {
  Apple,
  Banana,
}

declare const fruit: Fruit;
fruit === 0;
fruit === 'Apple';

enum Vegetable {
  Carrot,
}
fruit === Vegetable.Carrot;

Examples of correct code for this rule:

enum Fruit {
  Apple,
  Banana,
}

declare const fruit: Fruit;
fruit === Fruit.Apple;
fruit === Fruit.Banana;

#Original Documentation

• typescript-eslint no-unsafe-enum-comparison