Question

我尝试在data-lang标签上的click事件之后，使用以下代码获取a值：

$("[data-toggle=popover]").popover({
  html: true,
  content: function() {
    var content = $(this).attr("data-popover-content");
    return $(content).children(".popover-body").html();
  },
  title: function() {
    var title = $(this).attr("data-popover-content");
    return $(title).children(".popover-heading").html();
  }
});

$('.popover-body').on('click', 'a', function() {
  let lang = $(this).data("lang")
  alert(lang);
});

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<nav class="mainnav">
  <ul class="topnav">
    <a href="#" data-toggle="popover" data-popover-content="#a1">Popover</a>
  </ul>
</nav>
<div id="a1" class="hidden">
  <div class="popover-heading">_('Välj ditt språk')</div>
  <div class="popover-body">
    <div class="lang">
      <a href="#" data-lang="no">Norsk</a>
    </div>
    <div>
      <a href="#" data-lang="de">Deutsch</a>
    </div>
    <div>
      <a href="#" data-lang="nl">Nederlands</a>
    </div>
    <div>
      <a href="#" data-lang="es">Español</a>
    </div>
    <div>
      <a href="#" data-lang="dk">Dansk</a>
    </div>
  </div>
</div>

但是当我单击它时，什么也没发生。
我该如何解决？

Answer 1

问题是因为尽管您正在使用委托事件处理程序（这是解决此问题的正确方法），但插件并未将.popover-body元素与弹出窗口的内容一起克隆。如果您在打开弹出窗口后检查DOM中的元素，就会看到此信息。

要解决此问题，您可以使用.mainnav元素作为委派事件处理程序的主要选择器：

$("[data-toggle=popover]").popover({
  html: true,
  content: function() {
    var content = $(this).attr("data-popover-content");
    return $(content).children(".popover-body").html();
  },
  title: function() {
    var title = $(this).attr("data-popover-content");
    return $(title).children(".popover-heading").html();
  }
});

$('.mainnav').on('click', '.topnav div a', function() { // change this
  let lang = $(this).data("lang")
  console.log(lang);
});

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<nav class="mainnav">
  <ul class="topnav">
    <a href="#" data-toggle="popover" data-popover-content="#a1">Popover</a>
  </ul>
</nav>
<div id="a1" class="hidden">
  <div class="popover-heading">_('Välj ditt språk')</div>
  <div class="popover-body">
    <div class="lang">
      <a href="#" data-lang="no">Norsk</a>
    </div>
    <div>
      <a href="#" data-lang="de">Deutsch</a>
    </div>
    <div>
      <a href="#" data-lang="nl">Nederlands</a>
    </div>
    <div>
      <a href="#" data-lang="es">Español</a>
    </div>
    <div>
      <a href="#" data-lang="dk">Dansk</a>
    </div>
  </div>
</div>

Answer 2

问题似乎出在选择器上。在打开弹出窗口的源代码中，我看不到类popover-body。这应该可以：

$("[data-toggle=popover]").popover({
  html: true,
  content: function() {
    var content = $(this).attr("data-popover-content");
    return $(content).children(".popover-body").html();
  },
  title: function() {
    var title = $(this).attr("data-popover-content");
    return $(title).children(".popover-heading").html();
  }
});

$('body').on('click', '.popover-content a', function() {
  let lang = $(this).data("lang")
  alert(lang);
});

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>

<nav class="mainnav">
  <ul class="topnav">
    <a href="#" data-toggle="popover" data-popover-content="#a1">Popover</a>
  </ul>
</nav>
<div id="a1" class="hidden">
  <div class="popover-heading">_('Välj ditt språk')</div>
  <div class="popover-body">
    <div class="lang">
      <a href="#" data-lang="no">Norsk</a>
    </div>
    <div>
      <a href="#" data-lang="de">Deutsch</a>
    </div>
    <div>
      <a href="#" data-lang="nl">Nederlands</a>
    </div>
    <div>
      <a href="#" data-lang="es">Español</a>
    </div>
    <div>
      <a href="#" data-lang="dk">Dansk</a>
    </div>
  </div>
</div>

Answer 3

选择器“ popover-body”可能不存在问题。看看JsFiddle：https://jsfiddle.net/xe54r7db/37/

    $("[data-toggle=popover]").popover({
    html : true,
    content: function() {
      var content = $(this).attr("data-popover-content");
      return $(content).children(".popover-body").html();
    },
    title: function() {
      var title = $(this).attr("data-popover-content"); 
      return $(title).children(".popover-heading").html();
    }
  });
  //Register with document parent selector to attach event.
  $(document).on('click','.popover-content a',function(e){
 // e.preventDefault();
    let lang = $(this).data("lang")
    alert(lang);
  });

Answer 4

.on（）方法将事件处理程序附加到jQuery对象中当前选定的元素集，我将类选择器更改为文档，以将事件绑定到元素

$(document).on('click', 'a', function() {
     let lang = $(this).data("lang")
     alert(lang);
});

单击弹出窗口不起作用

4 个答案: