多选下拉框（select 下拉多选）_html-js-css

概述方法一：使用multiple-select.js和multiple-select .css实现 HTML代码：　　<select id=‘checkedLevel‘ style="width:120px;height:28px;" multiple="multiple"> 　　　　<option value="1">选项1</option> 　　　　<option value="2">选项1</

@H_404_7@方法一：使用multiple-select.Js和multiple-select .CSS实现

@H_404_7@HTML代码：

@H_404_7@Js代码：

　　$(‘#checkedLevel‘).multipleSelect({
　　　　addTitle: true,//鼠标点悬停在下拉框时是否显示被选中的值
　　　　selectAll: false,//是否显示全部复选框，默认显示
　　　　name: "质控级别",
　　　　selectAllText: "选择全部",//选择全部的复选框的text值
　　　　allSelected: "全部",//全部选中后显示的值
　　　　//delimiter: ‘,‘,//多个值直接的间隔符，默认是逗号
　　　　placeholder: "质控级别" //不选择时下拉框显示的内容
　　});

@H_404_7@//设置默认选中:其中数组中多个值用逗号分隔，值是option的value
　　$("#checkedLevel").multipleSelect(‘setSelects‘,[1001,1002]);
@H_404_7@设置选中后关闭下拉框：
$(‘#selectJcjb‘).multipleSelect("close");//其他的方法，可到Js中去查看方法名，根据实际情况进行调用。

@H_404_7@参照网址：http://wenzhixin.net.cn/p/multiple-select/docs/index.html?locale=zh_CN#with-optgroups1

　　　　　https://www.jqueryscript.net/form/jQuery-Plugin-For-Selecting-Multiple-Elements-Multiple-Select.html

　　　　 http://www.jq22.com/yanshi2604

　　　　 http://www.jq22.com/jquery-info2604

　　　　 http://www.jq22.com/jquery-info20898?tdsourcetag=s_pcqq_aiomsg

@H_404_7@提示：也可以使用bootstrap.multiselect实现，参照网址：http://davidstutz.de/bootstrap-multiselect/

原文：https://blog.csdn.net/shunhua19881987/article/details/81354122

@H_404_7@方法二：
@H_404_7@ 参考网址：http://www.17sucai.com/pins/31871.html

　　　　 https://blog.csdn.net/haibo0668/article/details/79774558

@H_404_7@方法三：

@H_404_7@效果展示：

@H_404_7@HTML代码：

@H_404_7@用法：

$(function () {

    $("#organID").fSelect();
});

@H_404_7@@H_404_7@@H_404_7@@H_404_7@CSS文件：

.fs-wrap {
    position: relative;
    display: inline-block;
    wIDth: 200px;
    Font-size: 12px;
    line-height: 1;
}

.fs-label-wrap {
    position: relative;
    border: 1px solID #ddd;
    cursor: default;
}

.fs-label-wrap,
.fs-dropdown {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.fs-label-wrap .fs-label {
    padding: 4px 22px 4px 8px;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hIDden;
}

.fs-arrow {
    wIDth: 0;
    height: 0;
    border-left: 6px solID transparent;
    border-right: 6px solID transparent;
    border-top: 6px solID #000;
    position: absolute;
    top: 0;
    right: 5px;
    bottom: 0;
    margin: auto;
}

.fs-dropdown {
    position: absolute;
    background-color: #fff;
    border: 1px solID #ccc;
    margin-top: 5px;
    wIDth: 100%;
    z-index: 1000;
}

.fs-dropdown .fs-options {
    max-height: 200px;
    overflow: auto;
}

.fs-search input {
    wIDth: 100%;
    padding: 2px 4px;
    border: 0;
}

.fs-option,
.fs-search,
.fs-optgroup-label {
    padding: 6px 8px;
    border-bottom: 1px solID #eee;
    cursor: default;
}

.fs-option {
    cursor: pointer;
}

.fs-option.hl {
    background-color: #f5f5f5;
}

.fs-wrap.multiple .fs-option {
    position: relative;
    padding-left: 30px;
}

.fs-wrap.multiple .fs-checkBox {
    position: absolute;
    display: block;
    wIDth: 30px;
    top: 0;
    left: 0;
    bottom: 0;
}

.fs-wrap.multiple .fs-option .fs-checkBox i {
    position: absolute;
    margin: auto;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    wIDth: 14px;
    height: 14px;
    border: 1px solID #aeaeae;
    border-radius: 2px;
    background-color: #fff;
}

.fs-wrap.multiple .fs-option.selected .fs-checkBox i {
    background-color: rgb(17,169,17);
    border-color: transparent;
    background-image: url(‘data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAGCAYAAAD+Bd/7AAAABHNCSVQICAgIfAhkiAAAAAlwSFlzAAALEgAACxIB0t1+/AAAABx0RVh0U29mdHdhcmUAQWRvYmUgrmlyZXdvcmtzIENTNXG14zYAAABMSURBVAiZfc0xDkAAFIPhd2Kr1WRjcAExuIgzGUTIZ/AkImJsofnbNBAfHvzAHjOKNzhiQ42IDFXCdivaaxAJd0xYshT3QqBxqnxeHvhunpu23xnmAAAAAElFTkSuQmCC‘);
    background-repeat: no-repeat;
    background-position: center;
}

.fs-wrap .fs-option:hover {
    background-color: #f5f5f5;
}

.fs-optgroup-label {
    Font-weight: bold;
}

.hIDden {
    display: none;
}


/*根据本项目自定义修改*/
.visibility-hIDden{
    display:block;
    visibility: hIDden;
    position:absolute;
    top:0;
}
.deptWrap,.fs-wrap,.fs-label-wrap{
    wIDth:100%;
    height:30px;
    -webkit-Box-sizing: border-Box;
    -moz-Box-sizing: border-Box;
    Box-sizing: border-Box;
}
.fs-wrap{position:relative}
.fs-label-wrap .fs-label{
    padding: 0;
    height: 30px;
    line-height: 30px;
    -webkit-Box-sizing: border-Box;
    -moz-Box-sizing: border-Box;
    Box-sizing: border-Box;
    padding-left:6px;
    padding-right:10px;
}
.btnFixed{
    height:28px;
    text-align:center;
}
.btnFixed>.buttonDefault{
    wIDth: 60px;
    height: 24px;
    background: rgb(86,148,254);
    border: none;
    margin-left: 10px;
    color: #fff;
    margin-top: 2px;
    border-radius: 4px;
}
.btnFixed>.buttonDefault:hover{
    background: rgb(181,226,254);
    color: #4284f5;
}
.fs-search{padding:2px 8px;}
.fs-dropdown{
    margin-top: 0px;
    Box-shadow: 4px 4px 4px #ddd;
}
.fs-wrap.multiple .fs-option.selected .fs-checkBox i{
    background-color: rgb(86,254);
}

@H_404_7@@H_404_7@Js文件：

(function($) {    $.fn.fSelect = function(options) {        if (typeof options == ‘string‘ ) {            var settings = options;        }        else {            //默认配置项            var settings = $.extend({                placeholder:  ‘ ===请选择=== ‘,//占位符，默认显示什么                numdisplayed: 10,//设置页面上可以显示几个选项（超出这个数量将会显示选择了n项）                overflowText: ‘选择了{n}项‘,//超出这个数量将会显示"选择了n项"                searchText: ‘搜索‘,//搜索框中占位符显示什么字                showSearch: true//是否显示搜索框            },options);        }        /**         * Constructor         */        function fSelect(select,settings) {            this.$select = $(select);            this.settings = settings;            this.create();        }        /**         * Prototype class         */        fSelect.prototype = {            create: function() {                var multiple = this.$select.is(‘[multiple]‘) ? ‘ multiple‘ : ‘‘;                this.$select.wrap(‘<div ></div>‘);                this.$select.before(‘<div ><div >‘ + this.settings.placeholder + ‘</div><span ></span></div>‘);                this.$select.before(‘<div ><div ></div></div>‘);                // this.$select.addClass(‘hIDden‘);                this.$select.addClass(‘visibility-hIDden‘);                this.$wrap = this.$select.closest(‘.fs-wrap‘);                //添加全选和清空按钮                var BtnFixed = ‘<div ><button  ID="selectAllBtn" type="button">全选</button><button  ID="clearallBtn" type="button">清空</button></div>‘;                this.$wrap.find(‘.fs-dropdown‘).append(BtnFixed);                this.reload();            },reload: function() {                //如果设置显示搜索框，执行下面方法                if (this.settings.showSearch) {                    var search = ‘<div ><input type="search" placeholder="‘ + this.settings.searchText + ‘" /></div>‘;                    this.$wrap.find(‘.fs-dropdown‘).prepend(search);                }                var choices = this.buildOptions(this.$select);                //获取到所有option选项                this.$wrap.find(‘.fs-options‘).append(choices);                //选中当前已选的值                var valArr = this.$select.val();                // if(valArr.length){                if(valArr){                    var $fsOption = this.$wrap.find(‘.fs-option‘);                    valArr.forEach(function(currentValue){                        $fsOption.each(function(){                            if(currentValue == $(this).attr(‘data-value‘)){                                $(this).addClass("selected");                            }                        });                    });                }                //获取到选中状态的选项                this.reloadDropdownLabel();            },destroy: function() {                this.$wrap.find(‘.fs-label-wrap‘).remove();                this.$wrap.find(‘.fs-dropdown‘).remove();                // this.$select.unwrap().removeClass(‘hIDden‘);                this.$select.unwrap().removeClass(‘visibility-hIDden‘);            },//获取select的option选项，并赋值到插件自定义的每一选项div里            buildOptions: function($element) {                var $this = this;                var choices = ‘‘;                $element.children().each(function(i,el) {                    var $el = $(el);                    //支持 optiongroup                    if (‘optgroup‘ == $el.prop(‘nodename‘).tolowerCase()) {                        choices += ‘<div >‘;                        choices += ‘<div >‘ + $el.prop(‘label‘) + ‘</div>‘;                        choices += $this.buildOptions($el);                        choices += ‘</div>‘;                    }                    else {                        var selected = $el.is(‘[selected]‘) ? ‘ selected‘ : ‘‘;                        choices += ‘<div  data-value="‘ + $el.prop(‘value‘) + ‘"><span ><i></i></span><div >‘ + $el.HTML() + ‘</div></div>‘;                    }                });                return choices;            },//每次加载时判断一下插件自定义的每一选项div哪些是选中状态，将选中状态对应的文字，push到一个数组labelText里，页面上显示出来的文字就是数组中获取到的文字            reloadDropdownLabel: function() {                var settings = this.settings;                var labelText = [];                this.$wrap.find(‘.fs-option.selected‘).each(function(i,el) {                    labelText.push($(el).find(‘.fs-option-label‘).text());                });                if (labelText.length < 1) {                    labelText = settings.placeholder;                }                else if (labelText.length > settings.numdisplayed) {                    labelText = settings.overflowText.replace(‘{n}‘,labelText.length);                }                else {                    labelText = labelText.join(‘,‘);                }                this.$wrap.find(‘.fs-label‘).HTML(labelText);                this.$wrap.find(‘.fs-label‘).attr("Title",labelText);                this.$select.change();            }        }        /**         * Loop through each matching element         */        return this.each(function() {            var data = $(this).data(‘fSelect‘);            if (!data) {                data = new fSelect(this,settings);                $(this).data(‘fSelect‘,data);            }            if (typeof settings == ‘string‘) {                data[settings]();            }        });    }    /**     * Events     */    window.fSelect = {        ‘active‘: null,‘IDx‘: -1    };    function setIndexes($wrap) {        $wrap.find(‘.fs-option:not(.hIDden)‘).each(function(i,el) {            $(el).attr(‘data-index‘,i);            $wrap.find(‘.fs-option‘).removeClass(‘hl‘);        });        $wrap.find(‘.fs-search input‘).focus();        window.fSelect.IDx = -1;    }    function setScroll($wrap) {        var $container = $wrap.find(‘.fs-options‘);        var $selected = $wrap.find(‘.fs-option.hl‘);        var itemmin = $selected.offset().top + $container.scrolltop();        var itemmax = itemmin + $selected.outerHeight();        var containerMin = $container.offset().top + $container.scrolltop();        var containerMax = containerMin + $container.outerHeight();        if (itemmax > containerMax) { // scroll down            var to = $container.scrolltop() + itemmax - containerMax;            $container.scrolltop(to);        }        else if (itemmin < containerMin) { // scroll up            var to = $container.scrolltop() - containerMin - itemmin;            $container.scrolltop(to);        }    }    //插件选项的点击事件    $(document).on(‘click‘,‘.fs-option‘,function() {        var $wrap = $(this).closest(‘.fs-wrap‘);        if ($wrap.hasClass(‘multiple‘)) {            var selected = [];            $(this).toggleClass(‘selected‘);            $wrap.find(‘.fs-option.selected‘).each(function(i,el) {                selected.push($(el).attr(‘data-value‘));            });        }        else {            var selected = $(this).attr(‘data-value‘);            $wrap.find(‘.fs-option‘).removeClass(‘selected‘);            $(this).addClass(‘selected‘);            $wrap.find(‘.fs-dropdown‘).hIDe();        }        $wrap.find(‘select‘).val(selected);        $wrap.find(‘select‘).fSelect(‘reloadDropdownLabel‘);    });    $(document).on(‘keyup‘,‘.fs-search input‘,function(e) {        if (40 == e.which) {            $(this).blur();            return;        }        var $wrap = $(this).closest(‘.fs-wrap‘);        var keywords = $(this).val();        $wrap.find(‘.fs-option,.fs-optgroup-label‘).removeClass(‘hIDden‘);        if (‘‘ != keywords) {            $wrap.find(‘.fs-option‘).each(function() {                var regex = new RegExp(keywords,‘gi‘);                if (null === $(this).find(‘.fs-option-label‘).text().match(regex)) {                    $(this).addClass(‘hIDden‘);                }            });            $wrap.find(‘.fs-optgroup-label‘).each(function() {                var num_visible = $(this).closest(‘.fs-optgroup‘).find(‘.fs-option:not(.hIDden)‘).length;                if (num_visible < 1) {                    $(this).addClass(‘hIDden‘);                }            });        }        setIndexes($wrap);    });    //显示隐藏下拉选项    $(document).on(‘click‘,function(e) {        var $el = $(e.target);        var $wrap = $el.closest(‘.fs-wrap‘);        if (0 < $wrap.length) {            if ($el.hasClass(‘fs-label‘)) {                window.fSelect.active = $wrap;                var is_hIDden = $wrap.find(‘.fs-dropdown‘).hasClass(‘hIDden‘);                $(‘.fs-dropdown‘).addClass(‘hIDden‘);                if (is_hIDden) {                    $wrap.find(‘.fs-dropdown‘).removeClass(‘hIDden‘);                }                else {                    $wrap.find(‘.fs-dropdown‘).addClass(‘hIDden‘);                }                setIndexes($wrap);            }        }        else {            $(‘.fs-dropdown‘).addClass(‘hIDden‘);            window.fSelect.active = null;        }    });    $(document).on(‘keydown‘,function(e) {        var $wrap = window.fSelect.active;        if (null === $wrap) {            return;        }        else if (38 == e.which) { // up            e.preventDefault();            $wrap.find(‘.fs-option‘).removeClass(‘hl‘);            if (window.fSelect.IDx > 0) {                window.fSelect.IDx--;                $wrap.find(‘.fs-option[data-index=‘ + window.fSelect.IDx + ‘]‘).addClass(‘hl‘);                setScroll($wrap);            }            else {                window.fSelect.IDx = -1;                $wrap.find(‘.fs-search input‘).focus();            }        }        else if (40 == e.which) { // down            e.preventDefault();            var last_index = $wrap.find(‘.fs-option:last‘).attr(‘data-index‘);            if (window.fSelect.IDx < parseInt(last_index)) {                window.fSelect.IDx++;                $wrap.find(‘.fs-option‘).removeClass(‘hl‘);                $wrap.find(‘.fs-option[data-index=‘ + window.fSelect.IDx + ‘]‘).addClass(‘hl‘);                setScroll($wrap);            }        }        else if (32 == e.which || 13 == e.which) { // space,enter            $wrap.find(‘.fs-option.hl‘).click();        }        else if (27 == e.which) { // esc            $(‘.fs-dropdown‘).addClass(‘hIDden‘);            window.fSelect.active = null;        }    });    //=========================全选=====================================    $(document).on(‘click‘,‘#selectAllBtn‘,function( ) {        var $wrap = $(this).closest(‘.fs-wrap‘);        if ($wrap.hasClass(‘multiple‘)) {            var selected = [];            $wrap.find(".fs-option").addClass(‘selected‘);            $wrap.find(‘.fs-option.selected‘).each(function(i,el) {                selected.push($(el).attr(‘data-value‘));            });        }        $wrap.find(‘select‘).val(selected);        $wrap.find(‘select‘).fSelect(‘reloadDropdownLabel‘);    });    //=========================全不选/清空=====================================    $(document).on(‘click‘,‘#clearallBtn‘,function( ) {        var $wrap = $(this).closest(‘.fs-wrap‘);        if ($wrap.hasClass(‘multiple‘)) {            var selected = [];            $wrap.find(".fs-option").removeClass(‘selected‘);            $wrap.find(‘.fs-option.selected‘).each(function(i,el) {                selected.push($(el).attr(‘data-value‘));            });        }        $wrap.find(‘select‘).val(selected);        $wrap.find(‘select‘).fSelect(‘reloadDropdownLabel‘);    });})(jquery);

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