Javascript 当用户提交表单时，如何禁用beforeunload操作？
我有一段代码：Javascript 当用户提交表单时，如何禁用beforeunload操作？,javascript,jquery,ajax,onbeforeunload,Javascript,Jquery,Ajax,Onbeforeunload,我有一段代码： <script> $(window).bind('beforeunload', function() { $.ajax({ async: false, type: 'POST', url: '/something' }); }); </script> 我想知道，当用户点击提交按钮时，我怎么能禁用此请求 基本上就像这里，等等。当您提出问题并决定关闭页面时，会出现警告窗口，但在提交表单时不会出现警告窗口。使用befor
<script>
$(window).bind('beforeunload', function() {
$.ajax({
async: false,
type: 'POST',
url: '/something'
});
});
</script>
$('form#someForm').submit(function() {
$(window).unbind('beforeunload');
});
return false;
$(document).ready(function(){
$(window).bind("beforeunload", function(){ return(false); });
});
$(window).unbind('beforeunload');
formXXX.submit();
$(window).unbind("beforeunload");
location.reload(true);
正在寻找ASP.NET web应用程序的Detect OnForeUnload我是， 如果使用ASP.NET和母版页和内容页在页面上更改某些输入控件，我必须显示警告消息。我在母版页上使用了3个内容占位符，最后一个在表单之后
<form runat="server" id="myForm">
<script>
var warnMessage = "Save your unsaved changes before leaving this page!";
$("input").change(function () {
window.onbeforeunload = function () {
return 'You have unsaved changes on this page!';
}
});
$("select").change(function () {
window.onbeforeunload = function () {
return 'You have unsaved changes on this page!';
}
});
$(function () {
$('button[type=submit]').click(function (e) {
window.onbeforeunload = null;
});
});
</script>
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
<script type="text/javascript" src="http://cdn.jsdelivr.net/jquery.dirtyforms/2.0.0-beta00006/jquery.dirtyforms.min.js"></script>
<script type="text/javascript">
$(function() {
$('#form_verify').dirtyForms();
})
</script>
<title></title>
<body>
<form id="form_verify" action="a.php" method="POST">
Firt Name <input type="text">
Last Name <input type="file">
<input type="submit">
</form>
如果您正在使用bind，请使用以下命令：
$('form').submit(function () {
$(window).unbind('beforeunload');
});
这对所有表单提交都很好。超级旧问题，但可能对其他人有用 简单地从submit事件中分离beforeunload对我来说是不起作用的，因为即使表单中存在用户必须修复的错误，也会调用submit处理程序。因此，如果用户试图提交表单，然后收到错误，然后单击另一个页面，他们将能够在没有警告的情况下离开 这是我的变通方法，似乎效果不错
(function($) {
var attached = false,
allowed = false;
// catch any input field change events bubbling up from the form
$("form").on("change", function () {
// attach the listener once
if (!attached) {
$("body").on("click", function (e) {
// check that the click came from inside the form
// if it did - set flag to allow leaving the page
// otherwise - hit them with the warning
allowed = $(e.target).parents("form").length != 0;
});
window.addEventListener('beforeunload', function (event) {
// only allow if submit was called
if (!allowed) {
event.preventDefault();
event.returnValue = 'You have unsaved changes.';
}
});
}
attached = true;
});
}(jQuery));
这样，如果单击以离开表单内部的页面（如submit按钮），则不会显示警告。如果单击离开页面源于表单外部，则会警告用户。添加以下行：return false；，但我在哪里添加了这行？$window.unbind'beforeunload'；向我抛出错误，如下所述未捕获的语法错误：意外的标记“.”但绑定在$window下也能正常工作。绑定“beforeunload”，函数{return“您确定要离开吗？”；}；对我来说，这很管用，而雅各布·雷金的回答却不管用
(function($) {
var attached = false,
allowed = false;
// catch any input field change events bubbling up from the form
$("form").on("change", function () {
// attach the listener once
if (!attached) {
$("body").on("click", function (e) {
// check that the click came from inside the form
// if it did - set flag to allow leaving the page
// otherwise - hit them with the warning
allowed = $(e.target).parents("form").length != 0;
});
window.addEventListener('beforeunload', function (event) {
// only allow if submit was called
if (!allowed) {
event.preventDefault();
event.returnValue = 'You have unsaved changes.';
}
});
}
attached = true;
});
}(jQuery));