Could you please provide some more information on what you would like to open? Are you trying to open an iframe on a page on a button click event? Something similar? Please let me know some more details and we can take a look.
Thanks for your reply . Yes there is our custom event for incoming call from our external service api and I can display the call information inside the iframe too all what i need is to open the iframe automatically (from js) to notify the user about the call.