继续浏览精彩内容
慕课网APP
程序员的梦工厂
打开
继续
感谢您的支持,我会继续努力的
赞赏金额会直接到老师账户
将二维码发送给自己后长按识别
微信支付
支付宝支付

用jQuery模拟select下拉框

慕后森
关注TA
已关注
手记 88
粉丝 57
获赞 235

很多时候,美工会觉得默认的select下拉框很难看(特别是右侧的下拉箭头按钮),他们通常喜欢用一个自定义的图标来代替这个按钮。这样就只能用 js + div 来模拟了,倒腾了一番,用jQuery模拟了下,当然网上这种文章也不少,只是懒得去看找,又重新发明轮子鸟:)

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
    <title>自己实现的下拉框</title>
    <style type="text/css" media="all">
        *{font-size:12px;line-height:18px;list-style:none;padding:0;margin:0;text-decoration:none;color:#000;border:0}
        .page{text-align:center;margin:50px;}
        input{border-bottom:solid 1px #ccc;height:18px}             
        .expand{display:none;position:absolute;width:200px;height:100px;overflow-y:auto;border:solid 1px #ccc};
        .expand li{margin:1px 0;background:#fff}
        .expand a{text-decoration:none;display:block;padding:0 5px;background:#efefef;margin:1px 0}
        .expand a:hover{background:#ff9}
    </style>
    <script type="text/javascript" src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.6.min.js"></script>
    <script type="text/javascript">
 
        function showExpand(targetId, expandId, expand_class) {
            //先关掉其它弹出的层
            if (expand_class != undefined) {
                $("." + expand_class).hide();
            }
 
            //判断是否为IE
            var isIE = (! +[1, ]);
 
            var expand = $("#" + expandId);
            var target = $("#" + targetId);
 
            var dx = 0;
            if (isIE) {
                dx = -2;
            }
            else {
                dx = 0;
            }
            expand.get(0).style.left = target.get(0).getBoundingClientRect().left + dx + "px";
            if (isIE) {
                dx = 17;
            }
            else {
                dx = 19;
            }
            expand.get(0).style.top = parseInt(target.get(0).getBoundingClientRect().top) + dx + "px";
            expand.show();
 
            //每个li点击时赋值
            $("#" + expandId).find("li").each(function (i) {
                $(this).show().click(function () {
                    target.val($(this).text().split(' ')[1]);
                    expand.hide();
                })
            })
 
              
        }
         
 
        function search(srcId, expandId) {
            var expand = $("#" + expandId);
            var src = $("#" + srcId);
 
            var A = expand.find("a");
            var v = src.val().toUpperCase();
 
            A.each(function (i) {
                if (v.length >= 2) {
                    if ($(this).text().toUpperCase().indexOf(v) == -1) {
                        $(this).parent().hide();
                    }
                    else {
                        $(this).parent().show();
                    }
                }
                if (v.length <= 0) {
                    $(this).parent().show();
                }
            })
            src.val(v);
        }
 
 
        $().ready(function(){
            $("#txt_city").keyup(function(){
                search('txt_city','city_select1');
            }).focus(function(){
                showExpand('txt_city','city_select1','expand')
            })
 
            $("#txt_city2").keyup(function(){
                search('txt_city2','city_select2');
            }).focus(function(){
                showExpand('txt_city2','city_select2','expand')
            })
        })
 
        function fnTest(){
            document.getElementById("txtTarget").value = document.getElementById("txtSrc").value;
        }
    </script>
</head>
<body>
    <div class="page" style="text-align: center">
        <input type="text" value="" id="txt_city" class="input_expand"  /><a
            href="#" onclick="showExpand('txt_city','city_select1','expand')">▼</a>
        <div class="expand" id="city_select1">
            <ul>
                <li><a href="javascript:void(0)">SH 上海</a></li>
                <li><a href="javascript:void(0)">BJ 北京</a></li>
                <li><a href="javascript:void(0)">HZ 杭州</a></li>
                <li><a href="javascript:void(0)">WH 武汉</a></li>
                <li><a href="javascript:void(0)">NJ 南京</a></li>
                <li><a href="javascript:void(0)">WX 无锡</a></li>
            </ul>
        </div>
           
        <input type="text" value="" id="txt_city2" class="input_expand"  /><a
            href="#" onclick="showExpand('txt_city2','city_select2','expand')">▼</a>
        <div class="expand" id="city_select2">
            <ul>
                <li><a href="javascript:void(0)">CN 中文</a></li>
                <li><a href="javascript:void(0)">EN 英语</a></li>
                <li><a href="javascript:void(0)">JP 日本</a></li>
                <li><a href="javascript:void(0)">RA 俄语</a></li>
                <li><a href="javascript:void(0)">FA 法语</a></li>
                <li><a href="javascript:void(0)">00 其它</a></li>
            </ul>
        </div>
 
        <br/>
        <br/>
        <input type="text" id="txtSrc" onkeyup="fnTest()" />
        <br/>
        <input type="text" id="txtTarget" />
    </div>
</body>
</html>

无图无真相,真相在此:

不足之处:

1、按键盘上下键时,没有高亮的自动移动

2、键入文字自动过滤结果时,感觉相对原生的select有些不自然

打开App,阅读手记
0人推荐
发表评论
随时随地看视频慕课网APP