Question

我编写了一个简单的JQuery脚本，可以在不同时间段自动关闭我网页上的每个警报。

这是我的JQuery代码：

<div class="alert alert-danger alert-dismissible" role="alert" auto-close="3000">
                <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                alert one
            </div>
<div class="alert alert-success alert-dismissible" role="alert" auto-close="5000">
                <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
                alert two
            </div>

以下是我的两个示例警报：

ondrop

每个警报都有一个带值的自定义属性，用作警报关闭时间段。

出于某种原因警报关闭无效。

Answer 1

在$(this)范围内更改了

setTimeout。将其缓存在变量中。在我的例子中that。

$(function() {
  var alert = $('div.alert[auto-close]');
  alert.each(function() {
    var that = $(this);
    var time_period = that.attr('auto-close');
    setTimeout(function() {
      that.alert('close');
    }, time_period);
  });
});

工作单位：

$(function() {
  var alert = $('div.alert[auto-close]');
  alert.each(function() {
    var that = $(this);
    var time_period = that.attr('auto-close');
    setTimeout(function() {
      that.alert('close');
    }, time_period);
  });
});

<script src="https://code.jquery.com/jquery.min.js"></script>
<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<div id="moo" class="alert alert-danger alert-dismissible" role="alert" auto-close="3000">
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span>
  </button>
  alert one
</div>
<div class="alert alert-success alert-dismissible" role="alert" auto-close="5000">
  <button type="button" class="close" data-dismiss="alert" aria-label="Close"><span aria-hidden="true">&times;</span>
  </button>
  alert two
</div>

Answer 2

我会在父元素上使用 .on("DOMSubtreeModified")：

<div id="messages"></div>
<script>
    // If anything gets appended in #messages, timer is set to remove first element
    $("#messages").on('DOMSubtreeModified', function(){
        var firstChild = this.firstChild;
        setTimeout(function(){
            $(firstChild).alert("close"); //You are looking for this
        }, 2000);
    })
</script>

Bootstrap警报自动关闭不起作用

2 个答案: