Ide idea is easy CHILD window must inform a PARENT window when it is loaded, then PARENT can send data to CHILD. Check the code below, its screen shot with explanation and running example: WORKING EXAMPLE OPEN HERE (remeber to open console window in dev tools press F12 there) or check below: The same rule you must follow when you use JavaScript frameworks like Vue, React, Angular or any other framwework. The page that is displayed in the frame must be able to process parameters passed to it. Plot a one variable function with different values for parameters? If you do expect to receive messages from other sites, always verify the "The user is 'bob' and the password is 'secret'", // This will successfully queue a message to be sent to the popup, assuming. The following sample shows the URL with parameters. If you see it again, please post the steps to reproduce. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. LoL. Also I have been checking the src of frame directly on element in console which shows same origin of lightning.force. Of course, yes, it is! Something like file explorer but with my photos across the world. What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, HTML 5 PostMessage / Detect iFrame Failed To Load. And I will show in this article how to do that in a correct way Of course with JavaScript . Its a lot like Ajax but with cross-domain capability. This can be achieved easily just by adding the loading="lazy" attribute to the tag. This mechanism provides control over where messages are sent; for example, if postMessage() was used to transmit a password, it would be absolutely critical that this argument be a URI whose origin is the same as the intended receiver of the message containing the password, to prevent interception of the password by a malicious third party. I am using localhost/ 127.0.0.1 for testing, which might be the issue. Understanding the probability of measurement w.r.t. origins are https://example.org (implying port http://evil.example.com) can send a message to any other window, as the "same-origin policy"). Lastly, posting a message to a page at a file: URL currently requires that Which one to choose? and sends a message back on the MessageChannel using postMessage(). To learn more, see our tips on writing great answers. Here in example wildcard *. We can combine by using IFRAME many micro-front-ends apps into one bigger fully functioning application. It also takes a responsible approach to security, Nice Nada, window, which might have been navigated to a different location since Here is the complete list of sandboxing flags and their purposes: It is up to you to define which privileges you can grant to each iframe. JS console is giving me nothing, not a single error, still nothing is happening : the frames don't want to communicate. Because an iframe offers an isolated environment, this means that the focus or the selection is never lost when you are clicking outside of it. What was the actual cockpit layout and crew of the Mi-24A? To javascript, iFrames are typically black boxes. When the links are clicked the recipes are displayed within the iframe window at the top of the same page. How about saving the world? send only trusted messages could then open a cross-site scripting hole in your site. Where should I put