select列表多选下拉框
注意：formSelects v4的一些操作： /zyc050707/article/details/109809503
1.引入文件formSelects-v4.css和formSelects-v4.min.js
2.在相关的select列表中按照如下格式，进行填写，便可以实现下拉多选（这里是在ftl中实现）
<div class="layui-row layui-col-space1"><div class="layui-col-xs6"><div class="layui-form-item"><label class="layui-form-label label-required-four">场景类型</label><div class="layui-input-block"><select multiple="multiple" id="add-sceneType" name="add-sceneType" lay-filter="add-sceneType" lay-verify="required" lay-search xm-select="addSceneTypeXmSelect" xm-select-show-count="1" xm-select-skin="default" xm-select-search-type="dl" xm-select-search><#if (sceneTypeList?size>1)><option value=""></option></#if><#list sceneTypeList! as temp><option style="font-size: 13px" value="${temp.transferId!}">${temp.transferValue!}</option></#list></select></div></div></div><div class="layui-col-xs6"><div class="layui-form-item"><label class="layui-form-label label-required-four">触点来源</label><div class="layui-input-block"><select multiple="multiple" id="add-inModeCode" name="add-inModeCode" lay-filter="add-inModeCode" lay-verify="required" lay-search xm-select="addInModeCode" xm-select-show-count="2" xm-select-skin="default" xm-select-search-type="dl" xm-select-search><#--<#if (inModeCodeList?size>1)><option value=""></option></#if><#list inModeCodeList! as temp><option value="${temp.transferId!}">${temp.transferValue!}</option></#list>--><#if (inModeCodeList?size>1)><option value=""></option></#if><#list inModeCodeList! as temp><option value="${temp.transferId!}">${temp.transferValue!}</option></#list></select></div></div></div></div>
<select multiple="multiple" id="add-sceneType" name="add-sceneType" lay-filter="add-sceneType" lay-verify="required" lay-search xm-select="addSceneTypeXmSelect" xm-select-show-count="1" xm-select-skin="default" xm-select-search-type="dl" xm-select-search><#if (sceneTypeList?size>1)><option value=""></option></#if><#list sceneTypeList! as temp><option style="font-size: 13px" value="${temp.transferId!}">${temp.transferValue!}</option></#list></select>
3.在js文件中取值
（1）var formSelects = layui.formSelects;
（2）根据上一步，进行取值
//获取select下拉列表--多选框选中内容--数据形式//var addSceneTypeArray = formSelects.value('addSceneTypeXmSelect','val');//获取select下拉列表--多选框选中内容--内容//var addSceneType = formSelects.value('addSceneTypeXmSelect','valStr');
