onMessage handler for web extension provided iFrame never fires

Question

Created Jan ’21

Replies 5

Boosts 1

Views 2.1k

Participants 4

I'm trying to convert a Safari App Extension to the newer Safari Web Extension API, and having an issue with an injected iFrame we use to protect user data. Inside our provided iFrame which which we source from:

Code Block safari-web-extension://<ID_HERE>/<HTML_FILE_HERE>

and is externally_connectable via the manifest.json.

Any scripts that run inside the iFrame are able to initiate communication with background scripts with no problem. However, any message initiated from background never registers on any onMessage listener. For example:

Code Block javascript// iframe.js
// WORKS FINE
browser.runtime.sendMessage({ greeting: "hello" })
.then((response) => {
    console.log("Received response: ", response);
});
// NEVER FIRES
browser.runtime.onMessage.addListener((request, sender, sendResponse) => {
    console.log("Received request: ", request);
});

I'm convinced this is an Apple bug because this same scenario for the App Extensions receives the request from the background scripts no problem. Can anyone prove me otherwise?

Boost

Answer 1

Engineer OP

Apple

Jan ’21

If you could file feedback at https://feedbackassistant.apple.com with a sample extension that reproduces the issue, that would be the most helpful for us.

Thanks for the feedback!

0

Answer 2

tylerdurden101390 OP

Jan ’21

Thank you, bweinstein. I've filed under FB8967592 with a sample demo. Hope that helps.

0

Answer 3

delphi90 OP

Nov ’21

Hi, I'm having the same problem, any progress so far? Thanks!

0

Answer 4

tomasd OP

May ’22

Hello, this problem is still present in the current version of Safari. Is there any plan to fix this?

0

Answer 5

Engineer OP

Apple

Jun ’22

This should be fixed in Safari for iOS 16, Safari on macOS Ventura, and the latest versions of Safari Technology Preview. Please let us know if you're still seeing this issue on any of those!

0