检测实际的表格变化？ [英] Detect actual form change?

问题描述

是否有现成的方法（可能在其中一个框架中）来检测表单与原始值相比是否已更改？

Is there a ready-made way (maybe in one of the frameworks) to detect whether a form has changed compared to its original values?

onchange事件不会发生，因为无论实际更改如何都会触发（例如，我可以勾选一个复选框，然后再关闭两次onchange事件）。

The onchange event won't do, because it fires regardless of actual change (I could for example tick a checkbox on, and off again, with two onchange events).

最后一种方法是将每个元素的原始值存储在隐藏字段中，然后遍历每个元素。如果有更快的方法，我会很高兴听到它！

The last resort would be to store each element's original value in a hidden field, and go through each one. If there is a faster method, I'd be happy to hear about it!

推荐答案

我不知道任何DOM检测对子/后代元素的值属性所做的更改的事件，但它应足以比较序列化之前/之后的值， $（'form'）。serialize（）。如果您已经特别了解此方法，我很抱歉，我假设您手动浏览表单元素并将值附加到字符串。

I'm not aware of any DOM event that detects changes made to children/descendant elements' value attributes, but it should be enough to compare the serialized values before/after, $('form').serialize(). I apologize if you already knew about this method specifically, I'm assuming you're manually going through form elements and appending values to a string.

这篇关于检测实际的表格变化？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！