如何在 JavaScript 中单击按钮时删除 li 元素?

javascriptweb developmentobject oriented programming更新于 2025/11/11 1:16:17

假设以下是我们的无序列表 (ul) −

<ul>
   <li class="subjectName">JavaScript <button>Remove</button></li>
   <br>
   <li class="subjectName">MySQL <button>Remove</button></li>
   <br>
   <li class="subjectName">MongoDB <button>Remove</button></li>
   <br>
   <li class="subjectName">Java <button>Remove</button></li>
</ul>

上面，您可以看到每个 li 元素上都有"Remove"按钮。单击此按钮，您可以删除任何 li 元素。

以下是单击按钮时删除 li 元素的代码；

示例

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initialscale=1.0">
<title>Document</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.
css" integrity="sha384-BVYiiSIFeK1dGmJRAkycuHAHRg32OmUcww7on3RYdg4Va+PmSTsz/K68vbdEjh4u"
crossorigin="anonymous">
</head>
<body>
<h1>Remove the subjects</h1>
<h2>The Subjects are as follows:</h2>
<ul>
<li class="subjectName">JavaScript <button>Remove</button></li>
<br>
<li class="subjectName">MySQL <button>Remove</button></li>
<br>
<li class="subjectName">MongoDB <button>Remove</button></li>
<br>
<li class="subjectName">Java <button>Remove</button></li>
</ul>
<script>
   var allSubjectName = document.querySelectorAll(".subjectName");
   for (var index = 0; index <allSubjectName.length; index++){
      allSubjectName[index].addEventListener("click", function(){
         this.classList.toggle("active");
      });
      allSubjectName[index].querySelector("button").addEventListener("click",
      function(){
         this.closest(".subjectName").remove();
      });
   }
</script>
</body>
</html>

要运行上述程序，请保存文件名"anyName.html(index.html)"，然后右键单击该文件。在 VS Code 编辑器中选择选项"使用 Live Server 打开"。