jQuery replaceWith replaceAll end的用法

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<%

    String path = request.getContextPath();

    String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/";

%>

<!DOCTYPE html>

<html>

<head>

<base href="<%=basePath%>">

<meta charset="UTF-8">

<title>b index</title>

<link rel='stylesheet' type="text/css" href='b/css/bootstrap.css'>

</head>

<body style="margin:150px;">

    <div id="div001">div001</div>

    <div id="div002">div002</div>

    <div id="div003">div003</div>

    <p><span>Hello</span>,how are you?</p>

    <div>

        <button id="btn001">click me to replaceWith new paragraph</button>

        <button id="btn002">click me to replaceWith div003</button>

        <button id="btn003">click me to replaceWith all div with pibib</button>

        <button id="btn004">click me to paragraph replaceAll div001 </button>

        <button id="btn005">click me to paragraph replaceAll div001 use end </button>

        <button id="btn006">click me to use end </button>

    </div>

    <script type="text/javascript" src="js/jquery-1.11.1.js"></script>

    <script type="text/javascript" src="b/js/bootstrap.js"></script>

    <script type="text/javascript" src="js/index028.js"></script>

</body>

</html>

$(function() {

    $('#btn001').click(btn001Click);

    $('#btn002').click(btn002Click);

    $('#btn003').click(btn003Click);

    $('#btn004').click(btn004Click);

    $('#btn005').click(btn005Click);

    $('#btn006').click(btn006Click);

});

function btn001Click() {

    // '<p>asdf'这样的写法竟然也可以；

    $('#div001').replaceWith('<p>asdf');

}

function btn002Click() {

    $('#div001').replaceWith($('#div003'));

}

function btn003Click() {

    // '<p><i><b><i><b>asdf'这样的写法，jQuery自己封口；

    // 还能把错误的</ul>给删除掉；

    $('div').replaceWith('<p><i><b></b></ul><i><b>asdf');

}

function btn004Click() {

    // 在这里面"<p>thisispa"竟然是无效的；必须自己封口；

    var res = $("<p>this is pa</p>").replaceAll($('#div001'));

    console.log(res);

    // 不需要添加回去；

    // $('#div002').before(res);

}

function btn005Click() {

    // 用不用end()都会给替换掉；

    var res = $("<p>this is use end</p>").replaceAll($('#div002')).end();

    console.log(res);

}

function btn006Click() {

    // obj2得到的竟然是[document]对象

    var obj2 = $('p').end();

    // obj得到的是[p]对象

    var obj = $("p").find("span").end();

    console.log(obj);

}