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javascript - 将数据切换添加到跨度元素时，未在 Enter 键上打开引导菜单

问题描述

  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/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/3.4.0/js/bootstrap.min.js"></script>

<div class="container">
  <h2>Dropdowns</h2>
  <p>The .dropdown class is used to indicate a dropdown menu.</p>
  <p>Use the .dropdown-menu class to actually build the dropdown menu.</p>
  <p>To open the dropdown menu, use a button or a link with a class of .dropdown-toggle and data-toggle="dropdown".</p>                                          
  <div class="dropdown">
    <button class="btn btn-primary dropdown-toggle" type="button" >Dropdown Example</button>
    <span tabindex=0 class="caret" data-toggle="dropdown"></span>
    <ul class="dropdown-menu" role="menu">
      <li><a href="#">HTML</a></li>
      <li><a href="#">CSS</a></li>
      <li><a href="#">JavaScript</a></li>
    </ul>
  </div>
</div>

我有一个跨度元素，它有一个背景图像搜索，点击搜索按钮我打开菜单。我不需要搜索按钮旁边的按钮，因此我将 data-toggle=dropdown 添加到我的跨度中。当我用鼠标单击时会打开下拉菜单，但是当我将焦点移到跨度并按 Enter 键时菜单不会打开。

Here it is reproducible

https://jsfiddle.net/rajp1513/z264ykfL/

标签： javascriptjquerytwitter-bootstrap-3

解决方案

您需要在 HTML 中进行一些更改。移动按钮标签内的data-toggle="dropdown"跨度并从跨度中删除属性并将其添加到按钮。

从

<button class="btn btn-primary dropdown-toggle" type="button" >Dropdown Example</button>
    <span tabindex=0 class="caret" data-toggle="dropdown"></span>

至

 <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
    <span tabindex=0 class="caret" data-toggle="dropdown"></span></button>

这是完整的代码

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.0/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/3.4.0/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>Dropdowns</h2>
  <p>The .dropdown class is used to indicate a dropdown menu.</p>
  <p>Use the .dropdown-menu class to actually build the dropdown menu.</p>
  <p>To open the dropdown menu, use a button or a link with a class of .dropdown-toggle and data-toggle="dropdown".</p>                                          
  <div class="dropdown">
    <button class="btn btn-primary dropdown-toggle" type="button" data-toggle="dropdown">Dropdown Example
    <span tabindex=0 class="caret" data-toggle="dropdown"></span></button>
    <ul class="dropdown-menu" role="menu">
      <li><a href="#">HTML</a></li>
      <li><a href="#">CSS</a></li>
      <li><a href="#">JavaScript</a></li>
    </ul>
  </div>
</div>

</body>
</html>

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