Disable / Enable components when you have changed

I have this variable ChangeRecord: boolean; .

In this method ngOnInit () , I check whether it is change or not

  ngOnInit() {
      this.empresa = new Empresa;
      if(this.routaAtual.snapshot.url.length > 1){
        let id = this.routaAtual.snapshot.url[1].path;
        this.alterarRegistro = true;
      } else {
        this.alterarRegistro = false;
        this.titulo = "Cadastrar banco";
      }
    }

I want some components to be inactive when the variable this.alter Record is true .

I was unable to do this with the disabled option.

How to proceed then?