javascript - 如何在填写表单时显示 onbeforeunload 警报？

Question

我想在选项卡关闭时显示“onbeforeunload 警报”，但是当我填写表单然后关闭选项卡时，“onbeforeunload 警报”不会出现。

如何更改代码，以便在填写表单时显示“onbeforeunload 警报”？ 这是我使用的代码:

window.onbeforeunload = confirmExit;

function confirmExit() {
  return "You are about to exit the system before freezing your declaration!     If you leave now and never return to freeze your declaration; then they will not     go into effect and you may lose tax deduction, Are you sure you want to leave     now?";
}
$(function() {
  $("a").click(function() {
    window.onbeforeunload = null;
  });
  $("input").click(function() {
    window.onbeforeunload = null;
  });
});

Answer 1

How can I change the code so "unbeforeunload alert" can show when the form is filled?

您实际上点击的是<input />通过填写表格吗？因此，一旦您单击 <input /> ，unbeforeunload设置为 null (删除警报)通过以下代码:

$("input").click(function() {
  window.onbeforeunload = null;
});

请删除该代码，然后就一切就绪了。 :)或者您可以定位提交按钮，更具体地说:

$("input").click(function() {
  window.onbeforeunload = null;
});
$("input[type='submit']").click(function() {
  window.onbeforeunload = confirmExit;
});