下拉列表(Select)

使用重置的CSS,重定义原生的下拉列表外观。

默认

自定义code><select>菜单只需要一个自定义类.form-select就可以触发自定义样式。自定义样式仅限于select的初始外观,并且由于浏览器的限制,无法修改<option>

<select class="form-select" aria-label="Default select example">
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        </select>

大小

Y您也可以选择从小型和大型定制选择,以匹配我们同样大小的文本输入。

<select class="form-select form-select-lg mb-3" aria-label=".form-select-lg example">
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        </select>
        
        <select class="form-select form-select-sm" aria-label=".form-select-sm example">
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        </select>

还支持多文件属性multiple ,按住Ctrl键,可以一次选择多个选项

<select class="form-select" multiple aria-label="multiple select example">
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        </select>

支持大小属性 size :

<select class="form-select" size="3" aria-label="size 3 select example">
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        </select>

禁用

在select上添加 disabled属性,使其显示为灰色,并删除指针事件。

<select class="form-select" aria-label="Disabled select example" disabled>
        <option selected>Open this select menu</option>
        <option value="1">One</option>
        <option value="2">Two</option>
        <option value="3">Three</option>
        </select>

Sass

Variables

$form-select-padding-y:             $input-padding-y;
        $form-select-padding-x:             $input-padding-x;
        $form-select-font-family:           $input-font-family;
        $form-select-font-size:             $input-font-size;
        $form-select-indicator-padding:     $form-select-padding-x * 3; // Extra padding for background-image
        $form-select-font-weight:           $input-font-weight;
        $form-select-line-height:           $input-line-height;
        $form-select-color:                 $input-color;
        $form-select-bg:                    $input-bg;
        $form-select-disabled-color:        null;
        $form-select-disabled-bg:           $gray-200;
        $form-select-disabled-border-color: $input-disabled-border-color;
        $form-select-bg-position:           right $form-select-padding-x center;
        $form-select-bg-size:               16px 12px; // In pixels because image dimensions
        $form-select-indicator-color:       $gray-800;
        $form-select-indicator:             url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'><path fill='none' stroke='#{$form-select-indicator-color}' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/></svg>");
        
        $form-select-feedback-icon-padding-end: $form-select-padding-x * 2.5 + $form-select-indicator-padding;
        $form-select-feedback-icon-position:    center right $form-select-indicator-padding;
        $form-select-feedback-icon-size:        $input-height-inner-half $input-height-inner-half;
        
        $form-select-border-width:        $input-border-width;
        $form-select-border-color:        $input-border-color;
        $form-select-border-radius:       $border-radius;
        $form-select-box-shadow:          $box-shadow-inset;
        
        $form-select-focus-border-color:  $input-focus-border-color;
        $form-select-focus-width:         $input-focus-width;
        $form-select-focus-box-shadow:    0 0 0 $form-select-focus-width $input-btn-focus-color;
        
        $form-select-padding-y-sm:        $input-padding-y-sm;
        $form-select-padding-x-sm:        $input-padding-x-sm;
        $form-select-font-size-sm:        $input-font-size-sm;
        
        $form-select-padding-y-lg:        $input-padding-y-lg;
        $form-select-padding-x-lg:        $input-padding-x-lg;
        $form-select-font-size-lg:        $input-font-size-lg;
        
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