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# consistent-generic-constructors

[Added in v0.1.14](https://github.com/web-infra-dev/rslint/releases/tag/v0.1.14)
## Configuration

| Preset                            | Configured Value |
| --------------------------------- | ---------------- |
| ✅ ts.configs.stylistic            | `"error"`        |
| ✅ ts.configs.stylisticTypeChecked | `"error"`        |


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

export default defineConfig([
  ts.configs.recommended,
  {
    rules: {
      '@typescript-eslint/consistent-generic-constructors': 'error',
    },
  },
]);
```

## Rule Details

Enforce specifying generic type arguments on the type annotation or the constructor of a variable declaration. When constructing a generic class, the type arguments can be placed either on the left-hand side (type annotation) or the right-hand side (constructor call). This rule enforces consistency.

The rule supports two modes: `"constructor"` (default) prefers type arguments on the constructor call, and `"type-annotation"` prefers them on the type annotation.

Examples of **incorrect** code for this rule (with default `"constructor"` option):

```typescript
const map: Map<string, number> = new Map();
const set: Set<string> = new Set();
```

Examples of **correct** code for this rule (with default `"constructor"` option):

```typescript
const map = new Map<string, number>();
const set = new Set<string>();
const map2: Map<string, number> = new Map<string, number>();
```

## Original Documentation

- [typescript-eslint: consistent-generic-constructors](https://typescript-eslint.io/rules/consistent-generic-constructors)
- [Source code](https://github.com/typescript-eslint/typescript-eslint/blob/v8.46.3/packages/eslint-plugin/src/rules/consistent-generic-constructors.ts)