Based on jquery, the beautiful drop-down box can be modified twice_jquery

Continue to post an article about the web front-end custom control - ComboBox (drop-down box). In the past, when I used the drop-down box control, I was always troubled by the ugly style. Now I share this control. I hope that useful colleagues can collect it or use it again. Modify to achieve the effect you want.

Decompose the custom drop-down box:

1. Create a constructor and initialize the assigned control value.

2. The bound control is presented in the foreground.

3. Click the drop-down box control to display the drop-down list

4. Click to trigger the drop-down box control and collapse the drop-down list.

5. Click the drop-down item to trigger the event.

The code is as follows:

Html code:

Copy code The code is as follows:

css style:

Copy code The code is as follows:

.dropdown span a{float:left;background:url(/img/Icon_BG.png);}
/*Drop-down box http://power.76741.com*/
.dropdown span a{background-position: -213px -75px;}
.dropdown{float:left;width:105px;}
.dropdown span{border:solid 1px #ccc;width:95%;height:28px;background:url(/img/tbline_bg.png);border-radius:8px;overflow:hidden;}
. dropdown span{float:left;padding-left:10px;line-height:28px; cursor:pointer;}
.dropdown span.active{border-radius:8px 8px 0px 0px;}
.dropdown span font {width:auto;margin-right: 0px;float:left;}
.dropdown span a{float:right;width:20px;height:20px;margin:4px 0;}
.dropdown p{border :solid 1px #ccc;border-top:0px;width:103px;display:none;position:absolute;margin-top:28px;background-color:#fff;z-index:3;max-height:280px;overflow -y: auto; overflow-x: hidden;}
.dropdown p a{float:left;line-height:28px;height:28px;padding-left:10px;color:#666;font-size:14px; cursor:default;text-align:left;width:100%;overflow:hidden;}
.dropdown p a:hover{background:url(/img/tbline_bg.png);color:#666;}

Js code:

1. Custom class:

Copy code The code is as follows:

//下拉框
var ComboBox = function () {
this.tag;
this.data_default;
this.data_list;
this.index = 0;

var _this = this;
var _index, _tag, _value;
//初始化
this.init = function () {
_tag = _this.tag;
_index = _this.index;
//设置对象
_this.setDropdown(_this.data_default, _this.data_list);
//赋值绑定事件
if (_tag.find('span font').length > 0) _value = _tag.find('span font').attr('_id');
if (_tag == undefined) { return false; }
_this.showEvent();
_this.selectedIndex(_index);
return true;
}
//设置下拉列表
this.setDropdown = function (default_data, list) {
var css = _tag.attr('class');
if (default_data == undefined) {
default_data = { id: 'null', name: '' };
}
var _html = '';
if (_tag.find('p').length > 0 && _tag.find('span').length > 0) {
$.each(list, function (i, value) {
_html = '' value.name '';
});
_tag.find('span font').replaceWith('' default_data.name '');
_tag.find('p').html(_html);
} else {
_html = '

';
_html = '' default_data.name '';
_html = '

';
if (list) {
$.each(list, function (i, value) {
_html = '' value.name '';
});
}
_html = '

';
_html = '

';
var parent = _tag.parent();
_tag.replaceWith(_html);
_tag = parent.find('.dropdown' (css.length > 0 ? '.' css.replace(' ', '.') : ''));
}
}
//下拉事件
this.showEvent = function () {
_tag.find('span').unbind('click').click(function () {
var p = $(this).parent().find('p');
if (p.css('display') == 'block') {
p.css('display', 'none');
$(this).removeClass('active');
} else if (p.html().length > 0) {
p.css('display', 'block');
$(this).addClass('active');
}
});
}
//选中事件
this.selectedIndex = function (index) {
_tag.find('p a').unbind('click').click(function () {
var parent = $(this).parent().parent();
//给下拉框赋值
if ($(this).text().length > 0) {
var font = parent.find('font');
font.text($(this).text());
font.attr("_id", $(this).attr('_id'));
_this.selectedIndexExpand(parent, $(this).index());
parent.find('span').removeClass('active');
}
parent.find('p').css('display', 'none');
});
if (_tag.find('p a').length <= _index) _index = 0;
if (_value && _value != '') {
_index = _tag.find('p a[_id="' _value '"]').index();
}
_tag.find('p a:eq(' _index ')').click();
}
//选中事件扩展
this.selectedIndexExpand = function (tag, index) { }
}

2、示例代码：

复制代码 代码如下:

//http://www.naoqiu.com
var array_state = [{ id: -1, name: '状态' }, { id: 1, name: '未成功' }, { id: 2, name: '成功' }, { id: 3, name: '失败'}];
//状态下拉控件
var select_type = new ComboBox();
select_type.tag = $('.select_type');
select_type.data_default = array_state[0];
select_type.data_list = array_state;
select_type.selectedIndexExpand = function (tag, index) {
//fun_Pager();
}
select_type.init();

3、示例图：