angular ng-change $event undefined

最新推荐文章于 2023-10-27 14:06:33 发布

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最新推荐文章于 2023-10-27 14:06:33 发布

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本文链接：https://blog.youkuaiyun.com/m0_37639199/article/details/73865348

本文探讨了AngularJS中ngChange指令的工作原理及其与事件处理的区别。ngChange通过设置作用域监听来工作，而非捕捉事件。文章澄清了常见的误解，并提供了实现自定义事件处理的方法。

今天用到ng-change事件，但是打印其$event时发现为undefined,网上找了些解释，以下为觉得解释的较为明白的。

ngChange is an directive, not an event-handler. The working is quite different. ngChange works by setting an scope.$watch, ngClick works by catching an event.
This behaviour is as documented, so this is a feature, not a bug.
I understand your confusion, it's an easily made mistake. If you want, you can create your own event handler using a (there is some irony here ;)) directive!
What is it you are trying to accomplish? Perhaps I can help you finding an alternative solution.