BriskBard, CEF4Delphi, WebView4Delphi, WebUI4Delphi and WebUI4CSharp

The TChromium.OnScrollOffsetChanged event is executed in OSR mode only.

If you use TChromium in normal mode you will need to use a low level mouse hook with SetWindowsHookEx and WH_MOUSE_LL.

If you use TChromium in OSR mode you have all mouse events in TBufferPanel.

If I remember correctly, there's no CEF event with that information but you can use JavaScript :
https://stackoverflow.com/questions/389 ... the-bottom
https://stackoverflow.com/questions/943 ... -to-bottom
https://stackoverflow.com/questions/100 ... out-jquery