在指令中，当一个元素从 DOM 中移除时，会发出 $destroy 事件.在指令的链接函数中，您可以执行以下操作:-

In the directive, when an element is removed from DOM, $destroy event is emitted. Inside your directive's link function, you can do this:-

element.on('$destroy', function() {
   // do stuff
});

有关更多信息和完整示例，请参阅文档此处

For more information and complete example, see documentation here

请参阅这个 plunker 以了解 $destroy 的作用.在这里，我在 2 秒后删除元素，并在控制台中销毁日志记录.

See this plunker to see $destroy in action. Here, I am removing the element after 2 seconds, and logging destroyed in console.