F2E合作社｜input group輸入群組｜Bootstrap 5網頁框架開發入門

前言

透過在文字輸入框兩側添加內容、按鈕⋯⋯等等變成群組，輕鬆的擴展表單元件，單打獨鬥可能不行，但是有群組的幫忙，像卡卡西說的：「 現在是發揮你們團隊精神的時候。 」

（ 圖片來源 ）

官方網站的 Input group 頁面

基本範例

在 input 的任一側放置一個附加元件或按鈕，也可以在 input 的兩面都放置，另外 <label> 必須於表單群組之外。

<div class="input-group mb-3">
    <span class="input-group-text" id="basic-addon1">@</span>
    <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="basic-addon1">
</div>

<div class="input-group mb-3">
    <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="basic-addon2">
    <span class="input-group-text" id="basic-addon2">@example.com</span>
</div>

<label for="basic-url" class="form-label">Your vanity URL</label>
<div class="input-group mb-3">
    <span class="input-group-text" id="basic-addon3">https://example.com/users/</span>
    <input type="text" class="form-control" id="basic-url" aria-describedby="basic-addon3">
</div>

<div class="input-group mb-3">
    <span class="input-group-text">$</span>
    <input type="text" class="form-control" aria-label="Amount (to the nearest dollar)">
    <span class="input-group-text">.00</span>
</div>

<div class="input-group mb-3">
    <input type="text" class="form-control" placeholder="Username" aria-label="Username">
    <span class="input-group-text">@</span>
    <input type="text" class="form-control" placeholder="Server" aria-label="Server">
</div>

<div class="input-group">
    <span class="input-group-text">With textarea</span>
    <textarea class="form-control" aria-label="With textarea"></textarea>
</div>

換行

input 群組透過預設的 flex-wrap: wrap 換行以適應 input 群組中的自定義表單驗證，可以使用 .flex-nowrap 禁用它。

<div class="input-group flex-nowrap">
    <span class="input-group-text" id="addon-wrapping">@</span>
    <input type="text" class="form-control" placeholder="Username" aria-label="Username" aria-describedby="addon-wrapping">
</div>

尺寸

將調整表單相對尺寸的 class 加到 .input-group 中，裡面的內容將自動調整大小，不需要在每個元素都重複放上控制表單尺寸的 class 。

不支援調整 input 群組中單一元素的大小。

input-group-sm

<div class="input-group input-group-sm">
    <span class="input-group-text" id="inputGroup-sizing-sm">Small</span>
    <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-sm">
</div>

input-group-lg

<div class="input-group input-group-lg">
    <span class="input-group-text" id="inputGroup-sizing-lg">Large</span>
    <input type="text" class="form-control" aria-label="Sizing example input" aria-describedby="inputGroup-sizing-lg">
</div>

核取方塊和選項按鈕

將任何複選框或單選框放置在輸入框中，而不是放置文字，如果輸入旁邊沒有可見的文字，建議將 .mt-0 添加到 .form-check-input 中。

checkbox

<div class="input-group">
    <div class="input-group-text">
        <input class="form-check-input mt-0" type="checkbox" value="" aria-label="Checkbox for following text input">
    </div>
    <input type="text" class="form-control" aria-label="Text input with checkbox">
</div>

radio

<div class="input-group">
    <div class="input-group-text">
        <input class="form-check-input mt-0" type="radio" value="" aria-label="Radio button for following text input">
    </div>
    <input type="text" class="form-control" aria-label="Text input with radio button">
</div>

多個 input

雖然支援多個 <input> 的呈現，但驗證樣式僅適用於只有單個 <input> 的 input 群組。

<div class="input-group">
    <span class="input-group-text">First and last name</span>
    <input type="text" aria-label="First name" class="form-control">
    <input type="text" aria-label="Last name" class="form-control">
</div>

支援多個附加元件

支援多個附加元件，可以與核取方塊和單選按鈕 input 混合使用。

<div class="input-group">
    <span class="input-group-text">$</span>
    <span class="input-group-text">0.00</span>
    <input type="text" class="form-control" aria-label="Dollar amount (with dot and two decimal places)">
</div>

<div class="input-group">
    <input type="text" class="form-control" aria-label="Dollar amount (with dot and two decimal places)">
    <span class="input-group-text">$</span>
    <span class="input-group-text">0.00</span>
</div>

按鈕附加元件

<div class="input-group">
    <button class="btn btn-outline-secondary" type="button" id="button-addon1">Button</button>
    <input type="text" class="form-control" placeholder="" aria-label="Example text with button addon" aria-describedby="button-addon1">
</div>

<div class="input-group">
    <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username" aria-describedby="button-addon2">
    <button class="btn btn-outline-secondary" type="button" id="button-addon2">Button</button>
</div>

<div class="input-group">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <input type="text" class="form-control" placeholder="" aria-label="Example text with two button addons">
</div>

<div class="input-group">
    <input type="text" class="form-control" placeholder="Recipient's username" aria-label="Recipient's username with two button addons">
    <button class="btn btn-outline-secondary" type="button">Button</button>
    <button class="btn btn-outline-secondary" type="button">Button</button>
</div>

帶下拉式選單的按鈕

<div class="input-group">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
    <input type="text" class="form-control" aria-label="Text input with dropdown button">
</div>

<div class="input-group">
    <input type="text" class="form-control" aria-label="Text input with dropdown button">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu dropdown-menu-end">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
</div>

<div class="input-group">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action before</a></li>
        <li><a class="dropdown-item" href="#">Another action before</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
    <input type="text" class="form-control" aria-label="Text input with 2 dropdown buttons">
    <button class="btn btn-outline-secondary dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Dropdown</button>
    <ul class="dropdown-menu dropdown-menu-end">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
</div>

分段按鈕

<div class="input-group">
    <button type="button" class="btn btn-outline-secondary">Action</button>
    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-bs-toggle="dropdown" aria-expanded="false">
        <span class="visually-hidden">Toggle Dropdown</span>
    </button>
    <ul class="dropdown-menu">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
    <input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
</div>

<div class="input-group">
    <input type="text" class="form-control" aria-label="Text input with segmented dropdown button">
    <button type="button" class="btn btn-outline-secondary">Action</button>
    <button type="button" class="btn btn-outline-secondary dropdown-toggle dropdown-toggle-split" data-bs-toggle="dropdown" aria-expanded="false">
        <span class="visually-hidden">Toggle Dropdown</span>
    </button>
    <ul class="dropdown-menu dropdown-menu-end">
        <li><a class="dropdown-item" href="#">Action</a></li>
        <li><a class="dropdown-item" href="#">Another action</a></li>
        <li><a class="dropdown-item" href="#">Something else here</a></li>
        <li><hr class="dropdown-divider"></li>
        <li><a class="dropdown-item" href="#">Separated link</a></li>
    </ul>
</div>

參考資料

1. Input group · Bootstrap v5.0
2. Input 群組 (Input group) · Bootstrap 5 繁體中文文件 - 六角學院 v5.0
3. 輸入群組組件 - 金魚都能懂的Bootstrap5網頁框架開發入門 | 網頁開發 | 網頁教學