[英]Way to check input element changes in a form
Is there anyway to check any of the HTML components (ie input elements) value in a form got changed so that i can pop up a alert saying "would like to save changes?" 无论如何,是否需要检查表单中的任何HTML组件(即输入元素)值是否已更改,以便我可以弹出警告说“想保存更改”? before navigating to other page.
导航到其他页面之前。
Thanks. 谢谢。
Since you have jQuery
in your question: 由于您的问题中包含
jQuery
:
After page load, use $.serialize to create a snapshot of the form. 页面加载后,使用$ .serialize创建表单的快照。
On submit, run serialize again. 提交后,再次运行序列化。
Then you can use use (or create) an isEqual
function to compare if there has been a change. 然后,您可以使用(或创建)一个
isEqual
函数来比较是否发生了更改。
This question might help you on that last step: How to determine equality for two JavaScript objects? 这个问题可能对您的最后一步有所帮助: 如何确定两个JavaScript对象的相等性?
EDIT 编辑
jQuery also has a serializeArray
method which may make that process easier. jQuery还有一个
serializeArray
方法,可以使该过程更容易。
https://api.jquery.com/serializeArray/ https://api.jquery.com/serializeArray/
jQuery('.form_component').change(function (){..});
, where form_component
should be a class common for all your input elements in the form. ,其中
form_component
应该是表单中所有输入元素的通用类。
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