[英]setTimeout(x, 0) not delaying in Chrome
I have a web page with a form on it; 我有一个带有表格的网页; I want to warn the user if they move away.
如果用户离开,我想警告他们。 I haven't implemented dirty checking so my
onbeforeunload
code is simply 我还没有实现脏检查,所以我的
onbeforeunload
代码很简单
window.onbeforeunload = function () {
return 'message'
};
I don't want this warning when they submit the form, so I remove the event on submit. 他们提交表单时,我不希望收到此警告,因此我在提交时删除了该事件。 However, the submit may fail , so I need to put the event back afterwards (so if they then navigate away they still get warned).
但是,提交可能会失败 ,因此我需要在事后将事件放回原处(因此,如果他们随后离开,他们仍然会收到警告)。 To that end I have done the following:
为此,我做了以下工作:
var tempDisableBeforeUnload = function() {
var obu = window.onbeforeunload;
if (obu) {
window.onbeforeunload = null;
setTimeout(function() {
window.onbeforeunload = obu;
}, 0);
}
}
$("form.noWarnOnSubmit").submit(tempDisableBeforeUnload);
This works fine in Firefox and IE - the setTimeout(x, 0)
defers the restoration of the event handler until after the submit
has decided whether it is successful or not . 这在Firefox和IE中可以正常工作
setTimeout(x, 0)
推迟事件处理程序的恢复,直到submit
决定成功与否之后 。
However, in Chrome, the timeout appears to occur immediately, and I get the warning when I submit my form. 但是,在Chrome中,超时似乎立即发生,并且在提交表单时收到警告。
How can I make this work on Chrome, or how else can I achieve the end of "don't warn on submit, but put the warning back if the submit fails"? 如何在Chrome上执行此操作,或者如何才能达到“不要警告提交,但如果提交失败,请放回警告”的结尾?
Cant you do the following: 不能执行以下操作:
var unloadActive = true;
window.onbeforeunload = function () {
if(unloadActive) return 'message'
};
$("form.noWarnOnSubmit").submit(function(event){
unloadActive = false;
// do all your checks and things, whatever, and if the checks fail:
unloadActive = true;
});
Then you don't need to do all that function juggling which might cause issues. 然后,您无需进行所有可能导致问题的功能处理。 I haven't tested this, but this is how I would do it.
我还没有测试过,但这就是我要做的。
I have overcome my immediate issue by 我已经克服了我眼前的问题
submit
event binding: submit
事件绑定,将我的事件绑定到jQuery验证事件之后触发: $(function() {
$("form.noWarnOnSubmit").submit(disableBeforeUnloadIfNotCancelled);
});
onbeforeunload
event if the submit
event is cancelled. submit
事件被取消的情况下才取消绑定onbeforeunload
事件。 var disableBeforeUnloadIfNotCancelled = function (e) {
if (!e.isDefaultPrevented()) {
window.onbeforeunload = null;
}
}
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