How to close the browser pop-up prompt function in jquery

When writing a web application, you will find that you need to create a browser that prompts the user if they are sure to leave the page when the close button is pressed, to avoid accidentally closing the application and losing user data. In this article, we'll show you how to achieve this using jQuery.

First, we need to capture the window closing event. To do this, we can use jQuery's $(window).on('beforeunload', function(){...}); method. This method will fire before the window is closed so that you can perform the necessary actions and ask the user if they want to close the window.

Then, we can use the event.preventDefault() method to prevent the browser from closing the window. This will provide users with an opportunity to reconsider their decision and avoid accidentally closing the application.

The following is sample code:

$(window).on('beforeunload', function(e){
  var message = '您确定要离开吗？'; // 提示用户是否确定离开的消息
  e.preventDefault(); // 防止浏览器关闭窗口
  e.returnValue = message; // 设置返回的消息字符串
  return message; // 返回提示用户是否确定离开的消息
});

Please note that due to browser security restrictions, the default value of the returned message string cannot be changed. This code will prompt the user if they are sure to leave and ask them to confirm or deselect.

You can also add other functions in this code, such as saving form data to the server, etc. Additionally, there are other similar jQuery plugins available that facilitate this.

When writing web applications, it is a very important task to ensure that user input data is protected and the application is closed unexpectedly. Using jQuery to achieve this will make your application more secure and reliable.

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