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# require-yield

[Added in v0.5.0](https://github.com/web-infra-dev/rslint/releases/tag/v0.5.0)
## 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: {
      'require-yield': 'error',
    },
  },
]);
```

## Rule Details

This rule generates warnings for generator functions that do not have the `yield` keyword.

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

```javascript
function* foo() {
  return 10;
}
```

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

```javascript
function* foo() {
  yield 5;
  return 10;
}

function foo() {
  return 10;
}

// This rule does not warn on empty generator functions.
function* foo() {}
```

## When Not To Use It

If you don't want to notify generator functions that have no `yield` expression, then it's safe to disable this rule.

## Original Documentation

- [ESLint: require-yield](https://eslint.org/docs/latest/rules/require-yield)
- [Source code](https://github.com/eslint/eslint/blob/v10.8.1/lib/rules/require-yield.js)