Emit an event in AngularJS

Question

How do you declare an output event for a component?

Accepted Answer

```typescript
@output() somethingChanged = new EventEmitter();
this.somethingChanged.emit(data);
```

Answer

```typescript
@output() somethingChanged = new OutputEvent();
this.somethingChanged.emit(data);
```

Answer

```typescript
$emit(new EventEmitter(data));
```

Answer

```typescript
@output() somethingChanged = data;
```

Question from the Angular 4 (legacy) test