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实例

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <title>4月8日作业</title>
    <style type="text/css">
        li {
            background-color: lightgreen;
            width: 200px;
            margin-top: 30px;
        }
        
        p {
            background-color: wheat;
            width:300px;
        }
    </style>
</head>
<body>
    <ul>
    <li>列表1</li>
    <li>列表2</li>
    <li>列表3</li>
    <li>列表4</li>
    </ul>
    <button>appendTo()</button>
    <button>prependTo()</button>
    <button>insertAfter</button>
    <button>insertBefore()</button>
    
    <p>被appendTo()移动的节点</p>
    <p>被prependTo()移动的节点</p>
    <p>被insertAfter()移动的节点</p>
    <p>被insertBefore()移动的节点</p>
</body>

<script type="text/javascript" src="./js/jquery-3.3.1.js"></script>
<script type="text/javascript">
$('button').eq(0).on('click',function(){
// 创建li节点,新节点在ul节点后面
var p=$('<li>').css('background-color','coral').html('我是appendTo()新生成的节点')
p.appendTo('ul')

//移动节点
$('p').eq(0).appendTo($('ul'))
})

$('button').eq(1).on('click',function(){
// var p=$('<li>').css('background-color','coral').html('我是prependTo()新生成的节点')
// p.prependTo('ul')
$('p').eq(1).prependTo($('ul'))
})


$('button').eq(2).on('click',function(){
var p=$('<li>').css('background-color','coral').html('我是insertAfter()新生成的节点')
p.insertAfter('li:eq(3)')
$('p').eq(2).insertAfter('li:eq(3)')
})

$('button').eq(3).on('click',function(){
var p=$('<li>').css('background-color','coral').html('我是insertBefore()新生成的节点')
p.insertBefore('li:eq(3)')
$('p').eq(3).insertBefore('li:eq(3)')
})

</script>
</html>

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