javascript - 使用 JavaScript 调用浏览器 X 按钮

Question

这个问题是因为this而提出的.问题可能是，该页面设计为仅当用户单击浏览器 X 按钮时才生成确认警报。我知道 window.close() 将关闭当前浏览器窗口，可能 与单击浏览器窗口的 X 不同。有没有什么方法可以使用 JavaScript 来重新创建浏览器 X 按钮上的点击操作，就好像真实用户会做的那样？

Answer 1

window.close()

This method is only allowed to be called for windows that were opened by a script using the window.open() method. If the window was not opened by a script, the following error appears in the JavaScript Console: Scripts may not close windows that were not opened by script. Mozilla Developer Network: window.close()

所以，没有办法通过 javascript 关闭浏览器，但是如果你不想触发一些应该在窗口关闭时执行的代码，试试这个:

//plain js
window.onunload();

//plain js
window.onbeforeunload();

//jQuery
$(window).unload();

或者如果你想在用户试图关闭窗口时执行代码，试试这个:

window.onbeforeunload = function(){
   // Do something
}
// OR
window.addEventListener("beforeunload", function(e){
   // Do something
}, false);

window.onunload = function(){
   // Do something
}
// OR
window.addEventListener("unload", function(e){
   // Do something
}, false);

// jQuery
$(window).unload(function(){
   // Do whatever you need
});

Since 25 May 2011, the HTML5 specification states that calls to window.alert(), window.confirm(), and window.prompt() methods may be ignored during this event. See the HTML5 specification for more details. MDN | window.onbeforeunload

这些事件按以下顺序触发:

1. window.beforeunload(可取消事件)
2. window.pagehide
3. window.unload