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# no-useless-switch-case

[Added in v0.6.5](https://github.com/web-infra-dev/rslint/releases/tag/v0.6.5)
## Configuration

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


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

export default defineConfig([
  unicornPlugin.configs.recommended,
  {
    rules: {
      'unicorn/no-useless-switch-case': 'error',
    },
  },
]);
```

## Rule Details

Disallows empty `case` clauses immediately before the final `default` clause in
a `switch` statement.

An empty case before the last `default` case is useless because execution falls
through to the same default body. Empty blocks and empty statements inside that
case still count as empty.

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

```javascript
switch (foo) {
  case 1:
  default:
    handleDefaultCase();
    break;
}
```

```javascript
switch (foo) {
  case 1: {
  }
  default:
    handleDefaultCase();
    break;
}
```

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

```javascript
switch (foo) {
  default:
    handleDefaultCase();
    break;
}
```

```javascript
switch (foo) {
  case 1:
  case 2:
    handleCase1And2();
    break;
}
```

```javascript
switch (foo) {
  case 1:
    handleCase1();
  default:
    handleDefaultCase();
    break;
}
```

## Original Documentation

- [eslint-plugin-unicorn: no-useless-switch-case](https://github.com/sindresorhus/eslint-plugin-unicorn/blob/v70.0.0/docs/rules/no-useless-switch-case.md)
- [Source code](https://github.com/sindresorhus/eslint-plugin-unicorn/blob/v70.0.0/rules/no-useless-switch-case.js)