Umer Hassan questions

• Beforeunload is not working to redirect user to another page, how can I redirect user to another page/url when he attempts to close a window/tab?
• Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 11
• Apply transition by using min-width and max-width together
• Is there any way to detect if user pressed "Stay on page" or "Leave page" in beforeunload event?
• Can't use Scanner.nextInt() and Scanner.nextLine() together [duplicate]
• What are abstract classes and abstract methods? [duplicate]

Umer Hassan answers