Signal detail or null (default)
signal callback delegate or function to connect
void callback(javascriptcore.value.Value value, webkit.user_content_manager.UserContentManager userContentManager)
value the value received from the JavaScript world. (optional)
userContentManager the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to ScriptMessageReceived signal.
This signal is emitted when JavaScript in a web view calls <code>window.webkit.messageHandlers.<name>.postMessage()</code>, after registering <code><name></code> using webkit.user_content_manager.UserContentManager.registerScriptMessageHandler