这是可能的，但前提是用户单击页面内的超链接。如果用户使用浏览器离开页面，他们将获得默认的浏览器对话框，该对话框没有保存选项。
Dirty Forms 会自动将事件附加（并删除处理程序）beforeunload，因此您尝试创建另一个事件处理程序肯定会失败。使用脏表单时，您永远不应该这样做。
你没有提到你想使用哪个模态对话框框架，所以我将只展示一个使用 jQuery UI 对话框的示例。集成其他对话框架也是类似的。为此，您可能需要查看现有预建对话框的源代码。
此外，您的用例有点短。如果用户想要离开并忽略更改怎么办？我添加了一个示例，其中包含一个额外的选项来做到这一点。
<html>
<head>
<link rel="stylesheet" type="text/css" href="//cdn.jsdelivr.net/jquery.ui/1.11.3/jquery-ui.min.css" />
</head>
<body>
<script type="text/javascript" src="//cdn.jsdelivr.net/g/jquery@1.11.3,jquery.ui@1.11.3,jquery.dirtyforms@2.0.0"></script>
<script type="text/javascript">
$(document).ready(function() {
// This is required by jQuery UI dialog
$('body').append('<div id="dirty-dialog" style="display:none;" />');
// This must be called before the first call to .dirtyForms
$(document).bind('bind.dirtyforms', function (ev, events) {
var originalOnRefireClick = events.onRefireClick;
events.onRefireClick = function (ev) {
if (saveForm) {
// TODO: Replace this with your AJAX function
// to save the form.
alert('saving form...');
}
originalOnRefireClick(ev);
};
});
// Flag indicating whether or not to save the form on close.
var saveForm = false;
$('.mainForm').dirtyForms({
dialog: {
// Custom properties to allow overriding later using
// the syntax $.DirtyForms.dialog.title = 'custom title';
title: 'Are you sure you want to do that?',
proceedAndSaveButtonText: 'Save Changes & Continue',
proceedAndCancelButtonText: 'Cancel Changes & Continue',
stayButtonText: 'Stay Here',
preMessageText: '<span class="ui-icon ui-icon-alert" style="float:left; margin:2px 7px 25px 0;"></span>',
postMessageText: '',
width: 650,
// Dirty Forms Methods
open: function (choice, message) {
$('#dirty-dialog').dialog({
open: function () {
// Set the focus on close button. This takes care of the
// default action by the Enter key, ensuring a stay choice
// is made by default.
$(this).parents('.ui-dialog')
.find('.ui-dialog-buttonpane button:eq(2)')
.focus();
},
// Whenever the dialog closes, we commit the choice
close: choice.commit,
title: this.title,
width: this.width,
modal: true,
buttons: [
{
text: this.proceedAndSaveButtonText,
click: function () {
// Indicate the choice is the proceed action
choice.proceed = true;
// Pass a custom flag to indicate to save the data first
// in the onRefireClick event
saveForm = true;
$(this).dialog('close');
}
},
{
text: this.proceedAndCancelButtonText,
click: function () {
// Indicate the choice is the proceed action
choice.proceed = true;
// Pass a custom flag to indicate not to save the data
// in the onRefireClick event
saveForm = false;
$(this).dialog('close');
}
},
{
text: this.stayButtonText,
click: function () {
// We don't need to take any action here because
// this will fire the close event handler and
// commit the choice (stay) for us automatically.
$(this).dialog('close');
}
}
]
});
// Inject the content of the dialog using jQuery .html() method.
$('#dirty-dialog').html(this.preMessageText + message + this.postMessageText);
},
close: function () {
// This is called by Dirty Forms when the
// Escape key is pressed, so we will close
// the dialog manually. This overrides the default
// Escape key behavior of jQuery UI, which would
// ordinarily not fire the close: event handler
// declared above.
$('#dirty-dialog').dialog('close');
}
}
});
});
</script>
Change one of the fields below, then click "Go to Google" to try to navigate away.
<form class="mainForm" action="jqueryui.html">
First name: <input type="text" name="fname"><br>
Last name: <input type="text" name="lname"><br>
<input type="submit" value="Submit">
</form>
<a href="http://www.google.com/">Go to Google</a>
</body>
</html>
该示例使用自定义事件绑定附加到onRefireClick事件处理程序，该事件处理程序在 时触发choice.proceed = true，但在 时不触发false。