Two way communication for WebViews

[schl3ck]

Your method is probably better than mine, but at the time of posting mine, the WebView.evaluatJavaScript function did not have the ability for the completion callback.

Possible to call functions defined in Scriptable in WebView?

I have here something, which is not quite the same what you asked, but it is the only workaround I know of. There is a way to send data to the Scriptable script from the WebView: Add a function to WebView.shouldAllowRequest that blocks all requests with a URL that starts with scriptable:// for example or something else. Now you can just use window.location.href from the WebView to “navigate” to a URL with your defined keyword at the start. As this request is blocked by Scriptable, the WebView …