#no-dupe-class-members

#Configuration

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

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'no-dupe-class-members': 'error',
    },
  },
]);

#Rule Details

Disallow duplicate names in class members. If there are declarations of the same name in class members, the last declaration silently overwrites the earlier ones, which can cause unexpected behavior.

Examples of incorrect code for this rule:

class A {
  bar() {}
  bar() {}
}

class B {
  bar() {}
  get bar() {}
}

class C {
  bar;
  bar;
}

class D {
  bar;
  bar() {}
}

class E {
  static bar() {}
  static bar() {}
}

Examples of correct code for this rule:

class A {
  bar() {}
  qux() {}
}

class B {
  get bar() {}
  set bar(value) {}
}

class C {
  bar;
  qux;
}

class D {
  bar;
  qux() {}
}

class E {
  static bar() {}
  bar() {}
}

TypeScript method overload signatures are allowed:

class A {
  foo(value: string): void;
  foo(value: number): void;
  foo(value: string | number) {}
}

#Original Documentation

https://eslint.org/docs/latest/rules/no-dupe-class-members