Result of ExecuteJavascript in ttmsfmxwebbrowser

The FMX UI component ttmsfmxwebbrowser has a function ExecuteJavascript with a result type String,
Unfortunatelly, returing the result of a javascript coding, is not implemented on Windows operation systems.

According to TMS support it is implemented for iOS and macOS only

Use case:
I build dynamically an UI and load it using the method WB1.LoadHTML(''+
'TEST1'+
' '+
'');

If the link is pressed I want to get these values for further processing.
As example I show the value in a dialog box:
Showmessage(WB1.ExecuteJavascript('document.getElementById("aaa").value'));