#no-duplicate-enum-values

#Configuration

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

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

#Rule Details

Disallows duplicate enum member values. Enum members that share the same literal value (number, string, or template literal) are almost always a mistake. This rule checks for duplicate initializer values within a single enum declaration.

Examples of incorrect code for this rule:

enum Direction {
  Up = 0,
  Down = 0,
}

enum Color {
  Red = 'red',
  Blue = 'red',
}

enum Num {
  A = 1,
  B = -1,
  C = 1,
}

Examples of correct code for this rule:

enum Direction {
  Up = 0,
  Down = 1,
  Left = 2,
  Right = 3,
}

enum Color {
  Red = 'red',
  Blue = 'blue',
  Green = 'green',
}

#Original Documentation

• typescript-eslint no-duplicate-enum-values