NgModel

Input can be a prosemirror document object or undefined or null

export class AppComponent implements OnInit, OnDestroy {
  html = '';

  onChange(html: object) {
    this.html = '';
  }

  ngOnInit(): void {
    this.editor = new Editor();
  }

  ngOnDestory(): void {
    this.editor.destroy();
  }
}

<ngx-editor [ngModel]="html" (ngModelChange)="onChange"></ngx-editor>