删除和添加Bootstrap 4警报类会破坏警报类型

Question

我正在用Bootstrap 4为一个web应用程序制作一个警报系统。这是我的代码：

function bsalert(str1, str2) {
$(".alert").addClass('show');
$(".alert").addClass('alert-'+str1);
$('.alert').html(str2);
setTimeout( function() {
$(".alert").removeClass('show');
$(".alert").removeClass('alert-'+str1);
}, 2000 );
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<div class="alert alert-dismissible fade text-center" role="alert" id="alert"></div>
<button type="button" class="btn btn-outline-primary" onclick="bsalert('danger', 'ALERT!');">one</button>
<button type="button" class="btn btn-outline-primary" onclick="bsalert('success', 'nice');">two</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>

我遇到的问题是，如果你做得太快，在计时器删除类之前，它会破坏更改警报类型的能力。我该怎么解决这个问题？Bootstrap内置了更好的功能吗？

编辑：在这个例子中，我简化了警报类型的数量，实际上不仅仅有danger和success。

Answer 1

我希望它能帮助你

var timer;
function bsalert(str1, str2) {
clearTimeout(timer)
$(".alert").removeClass('show');
$(".alert").removeClass('alert-danger');
$(".alert").removeClass('alert-success');
$(".alert").addClass('show');
$(".alert").addClass('alert-'+str1);
$('.alert').html(str2);

timer=setTimeout( function() {
$(".alert").removeClass('show');
$(".alert").removeClass('alert-'+str1);
}, 2000 );
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<div class="alert alert-dismissible fade text-center" role="alert" id="alert"></div>
<button type="button" class="btn btn-outline-primary" onclick="bsalert('danger', 'ALERT!');">one</button>
<button type="button" class="btn btn-outline-primary" onclick="bsalert('success', 'nice');">two</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>

Answer 2

现在，如果您使用设置超时功能，警报将在2秒内隐藏，因此在此期间，如果连续多次单击通知，它仍将在2秒钟内隐藏元素，这会产生一种效果，让您看到它很快就会消失，有几种解决方案：要么您为每个通知发布一个具有不同id的元素，或者限制函数调用或将其延迟两秒，或者禁用通知按钮2秒，以便每2秒才调用一次通知，也可以使用javascript的清除超时功能。

var timeoutElem;
function bsalert(str1, str2) {
var alertClassString = 'alert-' + str1;
var existingClass = '';
clearTimeout(timeoutElem);
existingClass = (str1 === "danger") ? 'alert-success' : 'alert-danger';
$(".alert").removeClass(existingClass);
$(".alert").addClass(alertClassString);
$(".alert").removeClass('show');
$(".alert").addClass('show');
$('.alert').html(str2);
timeoutElem = setTimeout(function() {
$(".alert").removeClass('show');
}, 2000);
}

<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">
<div class="alert alert-dismissible fade text-center" role="alert" id="alert"></div>
<button type="button" class="btn btn-outline-primary" onclick="bsalert('danger', 'ALERT!');">one</button>
<button type="button" class="btn btn-outline-primary" onclick="bsalert('success', 'nice');">two</button>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>