Question

我有选择下拉菜单我在该下拉列表中提供了2种不同的送货方式。如果我选择啜饮1我想隐藏Rest fexex运输选项＆安培;反之亦然，如果我选择任何联邦快递方法，我想隐藏免费提货

请检查下面的小提琴

var query = _context.AppSubOperationUserGroupMappings.Where(filterPredicate)
    .Select(x => x.UserGroup);

var allowedUserGroups = _context.Users.Where(x => x.Id == userId)
    .SelectMany(x => x.UserGroupUserMappings, (x, y) => y.UserGroup);

return query
    .Join(
        allowedUserGroups,
        x => x.Id,
        x => x.Id,
        (x, y) => false) // doesn't matter what to select
    .Any();

jsfiddle

Answer 1

尝试这样的事情（未经测试）

$('select').on('change', function() {
var arr1 = $('#shipping_method option:not(:selected)');
    for (var i = 0; i < arr1.length; i++) {
        $("#shipping_method").children("optgroup[label='" + arr1[i].value + "']").remove();
        console.log("removed");
        }
})

在I.E浏览器上选择下拉显示隐藏（添加删除元素）

1 个答案: