Bootstrap5 按钮

Bootstrap 5 提供了不同样式的按钮。

<button type="button" class="btn">基本按钮</button>
<button type="button" class="btn btn-primary">主要按钮</button>
<button type="button" class="btn btn-secondary">次要按钮</button>
<button type="button" class="btn btn-success">成功</button>
<button type="button" class="btn btn-info">信息</button>
<button type="button" class="btn btn-warning">警告</button>
<button type="button" class="btn btn-danger">危险</button>
<button type="button" class="btn btn-dark">黑色</button>
<button type="button" class="btn btn-light">浅色</button>
<button type="button" class="btn btn-link">链接</button>

按钮类可用于 <a>, <button>, 或 <input> 元素上:

<a href="#" class="btn btn-info" role="button">链接按钮</a>
<button type="button" class="btn btn-info">按钮</button>
<input type="button" class="btn btn-info" value="输入框按钮">
<input type="submit" class="btn btn-info" value="提交按钮">
<input type="reset" class="btn btn-info" value="重置按钮">

按钮设置边框

Bootstrap 5 也可以设置按钮多边框，鼠标移动到按钮上添加突出到效果：

<button type="button" class="btn btn-outline-primary">主要按钮</button>
<button type="button" class="btn btn-outline-secondary">次要按钮</button>
<button type="button" class="btn btn-outline-success">成功</button>
<button type="button" class="btn btn-outline-info">信息</button>
<button type="button" class="btn btn-outline-warning">警告</button>
<button type="button" class="btn btn-outline-danger">危险</button>
<button type="button" class="btn btn-outline-dark">黑色</button>
<button type="button" class="btn btn-outline-light text-dark">浅色</button>

不同大小的按钮

Bootstrap 5 可以设置按钮的大小，使用 .btn-lg 类设置大按钮，使用 .btn-sm 类设置小按钮：

<button type="button" class="btn btn-primary btn-lg">大号按钮</button>
<button type="button" class="btn btn-primary">默认按钮</button>
<button type="button" class="btn btn-primary btn-sm">小号按钮</button>

块级按钮

通过添加 .btn-block 类可以设置块级按钮，.d-grid 类设置在父级元素中：

<div class="d-grid">
    <button type="button" class="btn btn-primary btn-block">按钮 1</button>
</div>

如果有多个块级按钮，你可以使用用 .gap-* 类来设置：

<div class="d-grid gap-3">
  <button type="button" class="btn btn-primary btn-block">100% 宽度的按钮</button>
  <button type="button" class="btn btn-primary btn-block">100% 宽度的按钮</button>
  <button type="button" class="btn btn-primary btn-block">100% 宽度的按钮</button>
</div>

激活和禁用按钮

按钮可设置为激活或者禁止点击的状态。

.active 类可以设置按钮是可用的， disabled 属性可以设置按钮是不可点击的。 注意 <a> 元素不支持 disabled 属性，你可以通过添加 .disabled 类来禁止链接的点击。

<button type="button" class="btn btn-primary active">点击后的按钮</button>
<button type="button" class="btn btn-primary" disabled>禁止点击的按钮</button>
<a href="#" class="btn btn-primary disabled">禁止点击的链接</a>

加载按钮

我们也可以设置一个正在加载的按钮。

<button class="btn btn-primary">
  <span class="spinner-border spinner-border-sm"></span>
</button>

<button class="btn btn-primary">
  <span class="spinner-border spinner-border-sm"></span>
  Loading..
</button>

<button class="btn btn-primary" disabled>
  <span class="spinner-border spinner-border-sm"></span>
  Loading..
</button>

<button class="btn btn-primary" disabled>
  <span class="spinner-grow spinner-grow-sm"></span>
  Loading..
</button>

Bootstrap5 按钮组

Bootstrap 5 中允许我们将按钮放在同一行上。

可以在 <div> 元素上添加 .btn-group 类来创建按钮组。

<div class="btn-group">
  <button type="button" class="btn btn-primary">Apple</button>
  <button type="button" class="btn btn-primary">Samsung</button>
  <button type="button" class="btn btn-primary">Sony</button>
</div>

提示: 我们可以使用 .btn-group-lg|sm|xs 类来设置按钮组的大小。

<div class="btn-group btn-group-lg">
  <button type="button" class="btn btn-primary">Apple</button>
  <button type="button" class="btn btn-primary">Samsung</button>
  <button type="button" class="btn btn-primary">Sony</button>
</div>

垂直按钮组

可以使用 .btn-group-vertical 类来创建垂直的按钮组：

<div class="btn-group-vertical">
  <button type="button" class="btn btn-primary">Apple</button>
  <button type="button" class="btn btn-primary">Samsung</button>
  <button type="button" class="btn btn-primary">Sony</button>
</div>

内嵌按钮组及下拉菜单

我们可以在按钮组内设置下拉菜单：

<div class="btn-group">
  <button type="button" class="btn btn-primary">Apple</button>
  <button type="button" class="btn btn-primary">Samsung</button>
  <div class="btn-group">
    <button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">
       Sony
    </button>
    <div class="dropdown-menu">
      <a class="dropdown-item" href="#">Tablet</a>
      <a class="dropdown-item" href="#">Smartphone</a>
    </div>
  </div>
</div>

垂直按钮组及下拉菜单

<div class="btn-group-vertical">
    <button type="button" class="btn btn-primary">Apple</button>
    <button type="button" class="btn btn-primary">Samsung</button>
    <div class="btn-group">
        <button type="button" class="btn btn-primary dropdown-toggle" data-bs-toggle="dropdown">Sony</button>
        <ul class="dropdown-menu">
            <li><a class="dropdown-item" href="#">Tablet</a></li>
            <li><a class="dropdown-item" href="#">Smartphone</a></li>
        </ul>
    </div>
</div>

多个按钮组

按钮组可以一个个并列显示在同一行上：

<div class="btn-group">
  <button type="button" class="btn btn-primary">Apple</button>
  <button type="button" class="btn btn-primary">Samsung</button>
  <button type="button" class="btn btn-primary">Sony</button>
</div>

<div class="btn-group">
  <button type="button" class="btn btn-primary">BMW</button>
  <button type="button" class="btn btn-primary">Mercedes</button>
  <button type="button" class="btn btn-primary">Volvo</button>
</div>