# noop

> No-op function — safe default for required callback slots before the real handler is wired.

Source: https://ngwr.dev/reference/utils/noop  
Kind: Util

## Usage

```angular-ts
import { noop } from 'ngwr/utils';

class MyService {
  private onChange: (v: string) => void = noop;
}
```

## Why ngwr provides this

Inline `() => {}` defaults look harmless, but each call site / class instance creates a fresh function reference. That breaks `===` equality across renders and triggers unnecessary OnPush updates / `@Input` change-detection cycles. `noop` is a single shared reference — the comparison stays stable.

```angular-ts
// Native — each instance gets a fresh arrow, breaking ref equality.
class MyComponent {
  // `() => {}` here creates a new function per instance.
  onChange = () => {};
}
// → OnPush comparing `onChange` between renders sees "changed" every time.

// ngwr — single shared function reference; ref equality is stable.
class MyComponent {
  onChange = noop;
}
```

## API

| Name | Description | Type | Default |
| --- | --- | --- | --- |
| `noop()` | No-op function. Use as default for required callback slots. | `() => void` | `—` |