表单的“动作"和“onsubmit":哪个先执行? [英] A form's "action" and "onsubmit": Which executes first?

问题描述

我正在尝试调试一个网页，我看到一个表单元素的开头是

I'm trying to debug a webpage and I see a form element whose opening is

<form name="aspnetForm" method="post" action="default.aspx" onsubmit="javascript:return WebForm_OnSubmit();" id="aspnetForm">

只有 Web form 的基础知识，我想知道 action 和 onsubmit 的执行顺序是什么.

Having only a base knowledge of web forms, I'm wondering what the order of execution is for the action and onsubmit.

推荐答案

如果先解决了action，那么浏览器就会离开页面，JS执行环境就会消失，就会有在 onsubmit 中无处运行 JS，所以它不是.

If action was resolved first, then the browser would leave the page, the JS execution environment would go away, and there would be nowhere to run the JS in onsubmit, so it isn't.

事件处理程序在默认操作之前运行.他们可以取消默认操作.

Event handlers run before default actions. They can cancel default actions.

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