Question

这是我的下拉菜单。代码似乎没问题，没有错误，但它不会从菜单中提醒所选项目。

$(document).ready(function () {
    // this function is triggered as soon as something changes in the form
    $("select[name='inptPAN']").change(function () {
        //console.log('found change');
        alert($(this).val());

});
}

HTML：

<div id='selectPopup'>
    <form name='test'>
        <select id='inptPAN' name='inptPAN'>
            <option value='1'>item 1</option>
            <option value='2'>item 2</option>
            <option value='3'>item 3</option>
            <option value='4'>item 4</option>
            <option value='5'>item 5</option>
            <option value='6'>item 6</option>
        </select>
    </form>
</div>

Answer 1

你没有正确完成这项功能

$(document).ready(function () {
    // this function is triggered as soon as something changes in the form
    $("select[name='inptPAN']").change(function () {
        //console.log('found change');
        alert($(this).val());

});
});//you missed it

Answer 2

没有错误，但它不会从菜单中提醒所选项目。

没有小提琴包含错误，您可以在控制台中看到错误。

错误是：您遗漏了$(document).ready的结尾。

语法是：

$(document).ready(function () {    
});

试试这个：

 $(document).ready(function () {    
     $("select[name='inptPAN']").change(function () {
            alert($(this).val());        
     });
 });

Working Code

Answer 3

document.ready的语法就是这里的问题..

$(document).ready(function () {    
});

您必须使用});代替}

关闭document.ready功能

您的代码应如下所示..

$(document).ready(function () {    
     $("select[name='inptPAN']").change(function () {
            alert($(this).val());        
     });
 });

Answer 4

您的代码不完整。把);放在最后。如下

$(document).ready(function () {
    // this function is triggered as soon as something changes in the form
    $("select[name='inptPAN']").change(function () {
        //console.log('found change');
        alert($(this).val());

});
});

Answer 5

$(document).ready(function () {
// this function is triggered as soon as something changes in the form
$("select[name='inptPAN']").change(function () {
    //console.log('found change');
    alert($(this).val());
  });
});

弹出下拉项目选择

5 个答案: