Call Objective-C from Safari javascript?

Question

On OSX (say Yosemite), I'd like a way to call Objective-C from Safari/javascript. Is there a way to do this?

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Not what I'm looking for:

• embed a WebView / WKWebView in an app
• Start/control/load Safari from Objective-C
• use JXA outside of Safari (unless it connects in a way that let's me bridge to Objective-C from inside-Safari javascript).

Answer 1

No. There is no way to do this. The only interface to the client machine is the API which the browser provides.

Answer 2

I came across this reference. So the answer appears to be: yes if you are writing a plugin.

https://developer.apple.com/library/archive/documentation/AppleApplications/Conceptual/SafariJSProgTopics/ObjCFromJavaScript.html