TIWCGJQWatermarkOptions.HideBeforeUnload Property
If true, all watermarks will be hidden during the window's beforeunload event. This is done mainly because WebKit browsers remember the watermark text during navigation and try to restore the watermark text after the user clicks the Back button. We can avoid this by hiding the text before the browser has a chance to save it. The regular unload event was tried, but it seems the browser saves the text before that event kicks off, because it didn't work.
published property HideBeforeUnload: Boolean read FHideBeforeUnload write FHideBeforeUnload default True;
Property Value
Type: Boolean