@frontend_worker/search-selector/src/styles/components/dropdown.less

《远程搜索+单选》组件区别于element-ui或iview组件库的select远程搜索， ①将头部显示的值和下拉选项显示的值独立开来， ②避免远程加载时头部默认值显示异常， ③支持插槽自定义 ④将搜索框值放置于下拉弹框里面

@dropdown-prefix-cls: ~"@{css-prefix}dropdown";
@dropdown-item-prefix-cls: ~"@{dropdown-prefix-cls}-item";

.@{dropdown-prefix-cls} {
    display: inline-block;
    //position: relative;

    .@{select-dropdown-prefix-cls} {
        overflow: visible;
        max-height: none;
    }
    .@{dropdown-prefix-cls} {
        width: 100%;
    }

    .@{dropdown-prefix-cls}-arrow {
        transition: transform 0.2 ease-in-out;
        margin-top: -2px;
        &.up {
            transform: rotate(180deg);
            margin-top: -3px;
        }
    }
    &-rel{
        //display: inline-block;
        position: relative;
        &-user-select-none{
            -webkit-user-select: none;
            -moz-user-select: none;
            user-select: none;
        }
    }

    &-menu{
        min-width: 100px;
    }

    &-transfer{
        width: auto;
    }
    &-item-selected, &-item&-item-selected:hover{
        background:  ~`colorPalette("@{primary-color}", 1)`;
    }
}

.select-item(@dropdown-prefix-cls, @dropdown-item-prefix-cls);