Jquery检查是不是选择了选择框[重复]

Posted 2023-03-10

【中文标题】Jquery检查是不是选择了选择框[重复]

【英文标题】：Jquery check if select box is selected [duplicate]Jquery检查是否选择了选择框[重复]

【发布时间】：2015-07-05 23:04:21

【问题描述】：

我有 3 个选择框：

<div class="widget mm_select">
    <label for="ctrl_Customers_Region">Region</label>   <select name="Customers_Region" id="ctrl_Customers_Region" class="select"><option value="">No filtering</option><option value="emea" selected="">EMEA</option><option value="america">America</option><option value="apac">APAC</option><option value="global">Global</option></select></div>

<div class="widget mm_select ">
    <label for="ctrl_Customers_Branche">Business</label>    <select name="Customers_Branche" id="ctrl_Customers_Branche" class="select"><option value="">No filtering</option><option value="retail-fashion">Retail - Fashion</option><option value="retail-consumer-electronics">Retail - Consumer Electronics</option><option value="retail-digital-goods">Retail - Digital Goods</option><option value="retail-furniture">Retail - Furniture</option><option value="retail-other">Retail - Other</option><option value="manufacturing-automotive">Manufacturing - Automotive</option><option value="manufacturing-pharmaceuticals-chemicals">Manufacturing - Pharmaceuticals / Chemicals</option><option value="manufacturing-high-tech">Manufacturing - High-Tech</option><option value="manufacturing-other">Manufacturing - Other</option><option value="utilities-and-telco-utilities">Utilities and Telco - Utilities</option><option value="utilities-and-telco-telco">Utilities and Telco - Telco</option><option value="food-grocery-and-equipment">Food - Grocery and Equipment</option><option value="media-entertainment-and-publishing">Media, Entertainment, and Publishing</option><option value="b2b-and-distribution">B2B and Distribution</option></select></div>

如何检查是否选择了 3 个选择框？

谢谢

【问题讨论】：

$('select').is(':has(option[value!=""]:selected)')

【参考方案1】：

您可以找到已选择且没有值“”的选项：

 if($('select option:selected[value!=""]').length )  
    //more than one select box is selected
 

【讨论】：

谢谢，这个脚本是否适用于所有 3 个选择框？

选择器是全局的。所以是的。

酷，我试过这个，但它在 Firefox 中不起作用： if($('select option:selected[value!=""]').length ) $('body' ).animate( scrollTop: parseInt($(".ce_metamodels_frontendfilter").offset().top -320) , 2000);

你能创建相同的小提琴吗？？