This post will make you learn about the steps that will help you in showing message box on window close button. Asp.net mvc development company experts have intended this post for development community to assist them in web development project. You can read and find the way to show message box or confirm box on window close event.
I seen that many users searches for the examples that shows a message box or information box or confirm box on window close event or when user want to leave a page.
So, the following is the simple example which shows a popup message box when user trying to close a window tab or browser window using top right close button of browser or refresh the page.