javascript - Bootstrap 警报附加和淡入/淡出

Question

我想在关闭时使用 fadeIn 效果和 fadeOut 效果动态添加 Bootstrap 警报，我试过:

function alert(title, text, type) {
  var html = $("<div class='alert alert-dismissible hide fade " + type + "'><strong>" + title + "</strong> " + text + "<a href='#' class='close float-close' data-dismiss='alert' aria-label='close'>×</a></div>");
  $('body').append(html);
  html.addClass('in show');
}


$('#EMail').click(function() {
  alert('Error!', 'Your Email is not valid', 'alert-danger');
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js" integrity="sha384-smHYKdLADwkXOn1EmN1qk/HfnUcbVRZyYmZ4qpPea6sjB/pTJ0euyQp0Mk8ck+5T" crossorigin="anonymous"></script>
<input type="text" id="EMail" />

有了这个，关闭工作成功但附加 fadeIn 效果不起作用。如何在具有淡入效果的文档中附加 Bootstrap 警报？

请注意，我不需要 jQuery fadeIn 或 fadeOut 我只想使用标准 Bootstrap class 这样的 淡入淡出 + in 或 out

Answer 1

使用 setTimeout 更新函数

function alert(title, text, type) {
  var html = $("<div class='alert alert-dismissible hide fade in " + type + "'><strong>" + title + "</strong> " + text + "<a href='#' class='close float-close' data-dismiss='alert' aria-label='close'>×</a></div>");
  $('body').append(html);
  setTimeout(function() {
 html.addClass('show');
  },0);
}


$('#EMail').click(function() {
  alert('Error!', 'Your Email is not valid', 'alert-danger');
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<link href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-WskhaSGFgHYWDcbwN70/dfYBj47jz9qbsMId/iRN3ewGhXQFZCSftd1LZCfmhktB" crossorigin="anonymous">
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js" integrity="sha384-smHYKdLADwkXOn1EmN1qk/HfnUcbVRZyYmZ4qpPea6sjB/pTJ0euyQp0Mk8ck+5T" crossorigin="anonymous"></script>
<input type="text" id="EMail" />