app.component.ts

import { Component, OnInit } from '@angular/core';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})
export class AppComponent implements OnInit {
  title = 'app';
  menuOpen: boolean = false;

  constructor() { }

  ngOnInit() {}

  toogleMenu(){
    this.menuOpen = !this.menuOpen;
  }
}