提供跟原生 `` 元素类似的事件。 > [https://developer.mozilla.org/en-> US/docs/Web/API/HTMLElement/...](https://link.segmentfault.com/?enc=IhA4qjbZMOis8iWTOjzquQ%3D%3D.Yxhqo9oxGVEE5nyVVKP6JtaWroLhhrCDw%2BQiBJgFkPM0urJaL4efsVFHK6v0yLzjRI8alpLPmi2YInb3MOqaG6Qk%2B2xLWtnI0lVMG3n03%2BE%3D) 从源码能看到,是在 change 事件之前触发的: > > [https://github.com/ElemeFE/element/blob/dev/packages/select/src/select.vue#L685-L713](https://link.segmentfault.com/?enc=LaYOjVEP6jziHPWT9c%2Bk6Q%3D%3D.nTh6PF9nKFCRWKsjmbGZ8ZQSdrlhrKBWWOM%2BQPkOW3nsZYs%2BjbXcUCcxSrfDn%2Fu8qG3cGSWPTKb%2Fg0kPVD917GOor8GweHZx1sEpqWQbCznEN9RnlK5NhbvOx4Wjdm00) 至于为什么不写在文档上这个你就得问项目的维护人员了。