OnPostMessageCallback typedef
OnPostMessageCallback =
void Function(String? message, WebUri? sourceOrigin, bool isMainFrame, JavaScriptReplyProxy replyProxy)
The listener for handling WebMessageListener events sent by a postMessage()
on the injected JavaScript object.
Implementation
typedef void OnPostMessageCallback(String? message, WebUri? sourceOrigin,
bool isMainFrame, JavaScriptReplyProxy replyProxy);