div 隐藏于展开共3个方法

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>jquery 展开 收起</title>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <meta http-equiv="content-type" content="text/html; charset=utf-8"/>

    <script type="text/javascript" src="../js/jquery-3.3.1.js"></script>
</head>
<script>
/*    // 显隐项目介绍详情方法一
    $(function view_details_click(){
        $("#detailmain_a").bind('click',function(){
            if($("#deal_info_box").is(":hidden")){
                $("#deal_info_box").show();
                $(this).find("#view_details").text("收起详情");
                $(this).find(".fa").removeClass("fa-angle-right").addClass("fa-angle-down");
            }
            else{
                $("#deal_info_box").hide();
                $(this).find("#view_details").text("展开详情");
                $(this).find(".fa").removeClass("fa-angle-down").addClass("fa-angle-right");
            }
        });
        $("#detailmain_aa").bind('click',function(){
            $("#deal_info_box").hide();
            $("#view_details").text("展开详情");
        });
    });*/
/*//方法二
$(function view_details_click(){
    $("#detailmain_a").click(function () {
        $("#deal_info_box").slideToggle();
    });
    $("#detailmain_aa").click(function () {
        $("#deal_info_box").slideToggle();
    });

});*/
//方法三
$(function view_details_click(){
    $("#detailmain_a").click(function () {
        if($("#deal_info_box").is(":hidden")){
            $('#deal_info_box').slideDown('slow');
            $(this).text("收起︿");
        }
        else{
            $('#deal_info_box').slideUp('slow');
            $(this).text("展开﹀");

        }
    });
});
</script>
<body>
<p class="detailpd">
    项目详情介绍:
</p>
<a class="detailmain_a" href="javascript:void(0);" id="detailmain_a">
    <span id="view_details">展开详情></span><i class="fa fa-angle-right"></i>
</a>
<div class="deal_info_box pb15" id="deal_info_box" style="display:none">
    <!-- 此处引入要展开的具体文件内容 -->
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    123<br/>
    <a class="detailmain_aa tc" href="javascript:void(0);" id="detailmain_aa" style="width:130px;display:block;margin:0 auto">
        <span class="theme_fcolor" id="view_detailss">收起详情</span><i class="fa fa-angle-up theme_fcolor"></i>
    </a>
</div>
</body>
</html>
代码可直接复制站些到本地编辑器中测试。
div 隐藏于展开 共3个方法

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