我想检测用户何时离开浏览器,但是我需要检查某些情况,下面的脚本会跳过if(false)并始终提示请求,无论返回true还是false。
如何在提示前让它检查条件?
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-2.1.3.min.js"></script>
</head>
<body>
<script type="text/javascript">
$(document).ready(function ()
{
$(window).bind('beforeunload', function () {
if (false)
return "Are you sure? Your changes will be lost!";
else
return false; // or true doesn't matter
});
});
</script>
</body>
</html>
答案 0 :(得分:1)
我在示例中添加了一个文本框,并在提示消息之前更改了条件以检查值是否为1.
<html>
<head>
<script type="text/javascript" src="http://code.jquery.com/jquery-2.1.3.min.js"></script>
</head>
<body>
<!-- added textbox for verification //-->
<input type="text" id="text1"> </input>
<script type="text/javascript">
$(document).ready(function ()
{
$(window).bind('beforeunload', function () {
//changed the if condition to check if the value of the textbox is 1 and only prompt if it is 1
if ($('#text1').val()=="1")
return "Are you sure? Your changes will be lost!";
});
});
</script>
</body>
</html>