Javascript 关闭选项卡/浏览器时触发 Angularjs 事件
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Fire Angularjs event when tab/browser is closed
提问by Laziale
I would like to fire JS code in Angularjs controller.
我想在 Angularjs 控制器中触发 JS 代码。
I have this:
我有这个：
$scope.$on('$destroy', function () {
alert('page1');
});
This is working fine when I'm navigating away from the page which is using that controller but its not working when I'm closing tab/browser.
当我离开使用该控制器的页面时，这工作正常，但当我关闭选项卡/浏览器时它不起作用。
Do I need to use some other code to fire JS code when tab/browser is closing?
当标签/浏览器结束时，我是否需要使用其他代码来消除JS代码？
采纳答案by Mark
From the angular docs:
从角度文档：
$destroy();
Removes the current scope (and all of its children) from the parent scope. Removal implies that calls to $digest() will no longer propagate to the current scope and its children. Removal also implies that the current scope is eligible for garbage collection.
The $destroy() is usually used by directives such as ngRepeat for managing the unrolling of the loop.
Just before a scope is destroyed, a $destroy event is broadcasted on this scope. Application code can register a $destroy event handler that will give it a chance to perform any necessary cleanup.
Note that, in AngularJS, there is also a $destroy jQuery event, which can be used to clean up DOM bindings before an element is removed from the DOM.
$销毁（）；
从父作用域中移除当前作用域（及其所有子作用域）。移除意味着对 $digest() 的调用将不再传播到当前作用域及其子作用域。删除还意味着当前范围有资格进行垃圾收集。
$destroy() 通常被诸如 ngRepeat 之类的指令用于管理循环的展开。
就在一个作用域被销毁之前，一个 $destroy 事件在这个作用域上广播。应用程序代码可以注册一个 $destroy 事件处理程序，这将使它有机会执行任何必要的清理。
请注意，在 AngularJS 中，还有一个 $destroy jQuery 事件，可用于在从 DOM 中删除元素之前清理 DOM 绑定。
This just handles the situation where the scope itself is being destroyed, that does not seem to occur when the tab/browser is closed though.
这只是处理范围本身被销毁的情况，但在选项卡/浏览器关闭时似乎不会发生这种情况。
You will have to use lower level methods onunload and onbeforeunload events to handle this situation, here is another post you may find useful:
您将不得不使用较低级别的方法 onunload 和 onbeforeunload 事件来处理这种情况，这是您可能会发现有用的另一篇文章：
