All files / src/app/counter counter.component.ts

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import {Component, EventEmitter, Output} from "@angular/core";
import {FormBuilder, FormGroup, Validators} from "@angular/forms";
 
@Component({
  selector: 'app-counter',
  template: `Counter: {{counter}}`
})
export class CounterComponent {
  counter = 0
  public form: FormGroup
 
  constructor(private fb: FormBuilder) {
    this.form = fb.group({
      login: ['', Validators.required],
      email: ['']
    })
  }
 
  @Output() counterEmitter = new EventEmitter<number>()
 
  increment() {
    this.counter++
    this.counterEmitter.emit(this.counter)
  }
 
  decrement() {
    this.counter--
  }
}