JavaScript close shortcut key

In daily use of computers, we often need to close web pages or software. For users using Windows systems, the shortcut key Alt F4 can directly close the current window. But you know what? In some cases, this approach may have drawbacks, such as when programming in JavaScript.

JavaScript is a scripting language commonly used in web development. It can be used to create various interactive and dynamic effects. However, there are some problems with closing windows in JavaScript.

First of all, closing the window using the standard shortcut key Alt F4 will trigger the browser or operating system's close event, which means that some browsers may prompt the user to "Do you want to save changes?" or "Do you want to close all tabs?" ”, and these pop-ups will have a negative impact on the user experience.

Secondly, in some cases, the operation of closing the window is not the result that the user wants to see. For example, in some web applications developed using JavaScript, it may be necessary to perform some interface or data operations when the user attempts to close the window, such as prompting the user to save or leave the page, pop-up advertisements or confirmation boxes, etc. If the shutdown event is triggered directly, these operations cannot be completed and will cause unnecessary trouble to the user.

So, how to use JavaScript to close the current window without triggering the close event of the browser or operating system?

Two methods are introduced here:

1. Use the window.close() method

The window.close() method is used in JavaScript to close the current Window or tab method. Unlike Alt F4, it does not trigger the browser or operating system's close event, but directly closes the current window.

Sample code:

<button onclick="window.close()">关闭窗口</button>

2. Custom close event

Another way is to use a custom close event, when the user tries to close the window, Perform custom actions first, then close the window. In this way, some necessary operations can be completed before closing the window, while also avoiding triggering the closing event of the browser or operating system.

Sample code:

window.onbeforeunload = function(){
  // 在这里执行需要完成的操作，比如提示用户保存或离开页面、弹出广告或确认框等
  // ...
  // 然后返回一个提示字符串，让浏览器弹出确认框，让用户确认是否离开当前页面
  return "请确认是否离开当前页面";
}

It should be noted that the custom close event will only be triggered when the user tries to close the window. If the window is closed by other methods (such as clicking on a link to jump or using other shortcut keys), the event will not be triggered.

These two methods can be flexibly used in different development scenarios and can be selected according to actual needs.

In short, the method of closing a window in JavaScript is not limited to the Alt F4 shortcut key. By learning more methods, you can increase development efficiency and improve user experience.

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