编程 Javascript jQuery

JQuery常见节点操作实例分析

Posted in jQuery onMay 15, 2019

本文实例讲述了JQuery常见节点操作。分享给大家供大家参考，具体如下：

插入节点

append()和appengTo()：在现存元素内部，从后面插入
prepend()和prependTo()：在现存元素外部，从前面插入
after()和insertAfter()：在现存元素外部，从后面插入
before()和insertBefore():在现存元素外部，从前面插入

新建节点的插入

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script type="text/javascript">
    $(function () {
      // $('#div1').html('')这种用字符串的方式塞进去的性能是最高的，
      // 但是有点时候不方便用，因为这样会重写div1里面的元素
      $a=$('<a href="#" rel="external nofollow" >链接</a>>');
      $('#div1').append($a);/*在最后加入字符串，append从现成的元素的后面插入元素*/
      $a.appendTo($('#div1'));/*和append效果相同*/
      $p=$('<p>这是一个p标签</p>');
      $("#div1").prepend($p);
      $h2=$('<h2>这是一个h2</h2>');
      $('#div1').after($h2);
      $h3=$('<h3>这是一个h3</h3>');
      $('#div1').before($h3);
    })
  </script>
</head>
<body>
  <div id="div1">
    <h1> 这是一个h1元素</h1>
  </div>
</body>
</html>

已有节点的插入

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script type="text/javascript">
    $(function () {
      $('#p1').insertBefore($("#title01"));/*换两个节点顺序*/
    })
  </script>
</head>
<body>
  <h1 id="title01">这是一个h1元素</h1>
  <p id="p1">这是一个p元素</p>
  <span id="span01">这是一个span元素</span>
</body>
</html>

删除节点

remove()：删除节点

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script type="text/javascript">
    $(function () {
      $('#p1').insertBefore($("#title01"));/*换两个节点顺序*/
      $('#p1').remove();
    })
  </script>
</head>
<body>
  <h1 id="title01">这是一个h1元素</h1>
  <p id="p1">这是一个p元素</p>
  <span id="span01">这是一个span元素</span>
</body>
</html>

关于a标签的问题

<a href="javascript:alert('ok?');" rel="external nofollow" >链接</a>

如果这样写就是插入JavaScript语句，弹出ok，如果是写#就是连接到页面顶部。

todolist网页

实现一个用户自己列计划的网页

JQuery常见节点操作实例分析

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>todolist</title>
  <style type="text/css">
    .list_con {
      width: 400px;
      margin: 50px auto 0;
    }
    .inputtxt {
      width: 350px;
      height: 30px;
      border: 1px solid #ccc;
      padding: 0px;
      text-indent: 10px;
    }
    .inputbtn {
      width: 40px;
      height: 32px;
      padding: 0px;
      border: 1px solid #ccc;
    }
    .list {
      margin: 0;
      padding: 0;
      list-style: none;
      margin-top: 20px;
    }
    .list li {
      height: 30px;
      line-height: 30px;
      border-bottom: 1px solid #ccc;
    }
    .list li span {
      float: left;
    }
    .list li a {
      float: right;
      text-decoration: none;
      margin: 0 10px;
    }
  </style>
  <script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
  <script type="text/javascript">
    $(function () {
      var $inputtxt = $('#txt1');
      var $btn = $('#btn1');
      var $ul = $('#list');
      $btn.click(function () {
        var $val = $inputtxt.val();
        /*获取input框的值*/
        if ($val == "") {
          alert("请输入内容");
          return;
        }
        else {
          alert(1);
          var $li=$('<li><span>'+$val+'</span><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="up"> ↑ </a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="down"> ↓ </a><a\n' +
            '        href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="del">删除</a></li>');
          $li.appendTo($ul);
          $inputtxt.val("");/*获取到值之后，清空*/
          var $a=$li.find('.del');
          $a.click(function () {
            $(this).parent().remove();
          });
          $li.find('.up').click(function () {
            $(this).parent().insertBefore($(this).parent().prev());
          });
          $li.find('.down').click(function () {
            $(this).parent().insertAfter($(this).parent().next());
          });
        }
      });
      $del=$(".del");
      $del.click(function () {
        $(this).parent().remove();
      });
      $('.up').click(function () {
        $(this).parent().insertBefore($(this).parent().prev());
      });
      $('.down').click(function () {
        $(this).parent().insertAfter($(this).parent().next());
      });
    })
  </script>
</head>
<body>
<div class="list_con">
  <h2>To do list</h2>
  <input type="text" name="" id="txt1" class="inputtxt">
  <input type="button" name="" value="增加" id="btn1" class="inputbtn">
  <ul id="list" class="list">
    <li><span>学习html</span><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="up"> ↑ </a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="down"> ↓ </a><a
        href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="del">删除</a></li>
    <li><span>学习css</span><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="up"> ↑ </a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="down"> ↓ </a><a
        href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="del">删除</a></li>
    <li><span>学习javascript</span><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="up"> ↑ </a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="down">
      ↓ </a><a href="javascript:;" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="del">删除</a></li>
  </ul>
</div>
</body>
</html>

感兴趣的朋友可以使用在线HTML/CSS/JavaScript代码运行工具：http://tools.3water.com/code/HtmlJsRun 测试上述代码运行效果。

希望本文所述对大家jQuery程序设计有所帮助。

JQuery常见节点操作实例分析

- Author -

SpecYue

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

jQuery 相关文章推荐

纯jQuery实现前端分页功能

Mar 23 jQuery

jQuery鼠标悬停内容动画切换效果

Apr 27 jQuery

jQuery滑动到底部加载下一页数据的实例代码

May 22 jQuery

jquery单击文字或图片内容放大并居中显示

Jun 23 jQuery

jQuery动画_动力节点节点Java学院整理

Jul 04 jQuery

jQuery事件对象的属性和方法详解

Sep 09 jQuery

jQuery简单实现对数组去重及排序操作实例

Oct 31 jQuery

jquery获取transform里的值实现方法

Dec 12 jQuery

JQuery animate动画应用示例

May 14 jQuery

jQuery实现鼠标移入显示蒙版效果

Jan 11 jQuery

jQuery擦除插件eraser使用方法详解

Jan 11 jQuery

jQuery带控制按钮轮播图插件

Jul 31 jQuery

JQuery属性操作与循环用法示例

May 15 #jQuery

jquery+css实现Tab栏切换的代码实例

May 14 #jQuery

jquery实现二级导航下拉菜单效果实例

May 14 #jQuery

JQuery获取可视区尺寸和文档尺寸及制作悬浮菜单示例

May 14 #jQuery

jquery 验证用户名是否重复代码实例

May 14 #jQuery

JQuery获取元素尺寸、位置及页面滚动事件应用示例

May 14 #jQuery

JQuery animate动画应用示例

May 14 #jQuery