title: crbug/1173575, non-JS module files deprecated in angular
body: <p>in my angular 12 code as soon as I run following:
  private renderer: Renderer2,
  <strong>this.renderer.appendChild(ipsiContainer, html);</strong>
  I face crbug/1173575, non-JS module files deprecated and my iframe is not loaded, could you please help me with that</p>