Angular 4, display pdf in current tab

Question

In my angular 4 application I want to display a PDF, I found this good way: PDF Blob is not showing content, Angular 2

But in this way I open a new tab in the browser and for example in my case this new popup was blocked by adblock. So there is a way to show the PDF in the current tab? And something to avoid adblock?

Component.ts

print() {
    this.ticketBundleService.downloadPDF().subscribe(
      (res) => {
        const fileURL = URL.createObjectURL(res);
        window.open(fileURL);
      }
    );
  }

Service.ts

  downloadPDF(): any {
    return this.http.get('http://......', {responseType: 'blob'}).map(
      (res) => {
        return new Blob([res], {type: 'application/pdf'})
      })
  }