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# no-setter-return

[Added in v0.4.0](https://github.com/web-infra-dev/rslint/releases/tag/v0.4.0)
## Configuration

| Preset                   | Configured Value |
| ------------------------ | ---------------- |
| ✅ js.configs.recommended | `"error"`        |


```ts title=rslint.config.ts
import { defineConfig, js } from '@rslint/core';

export default defineConfig([
  js.configs.recommended,
  {
    rules: {
      'no-setter-return': 'error',
    },
  },
]);
```

## Rule Details

Disallows returning a value from a setter. Setters cannot meaningfully return values since any return value is silently ignored by the JavaScript engine. A bare `return;` (without a value) is allowed for control flow purposes.

Examples of **incorrect** code for this rule:

```javascript
var foo = {
  set a(val) {
    return 1;
  },
};

class A {
  set a(val) {
    return val;
  }
}

var bar = {
  set a(val) {
    return undefined;
  },
};
```

Examples of **correct** code for this rule:

```javascript
var foo = {
  set a(val) {
    val = 1;
  },
};

class A {
  set a(val) {
    if (!val) {
      return; // bare return for flow control is fine
    }
    this._a = val;
  }
}

class B {
  get a() {
    return this._a; // getters can return values
  }
}
```

## Original Documentation

- [ESLint: no-setter-return](https://eslint.org/docs/latest/rules/no-setter-return)
- [Source code](https://github.com/eslint/eslint/blob/v10.8.1/lib/rules/no-setter-return.js)