如何在Bootstrap中获取跨越父级全宽的按钮组？

Question

在Bootstrap中,如何获得跨越父元素的整个宽度的按钮组？(与".btn-block"类一样,但应用于组http://getbootstrap.com/css/#buttons-sizes)

<div class="btn-group" role="group" aria-label="...">
  <button type="button" class="btn btn-default">Left</button>
  <button type="button" class="btn btn-default">Middle</button>
  <button type="button" class="btn btn-default">Right</button>
</div>

Answer 1

Flexbox可以做到这一点.

.btn-group.special {
  display: flex;
}

.special .btn {
  flex: 1
}

<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" rel="stylesheet" />
<div class="btn-group special" role="group" aria-label="...">
  <button type="button" class="btn btn-default">Left</button>
  <button type="button" class="btn btn-default">Middle</button>
  <button type="button" class="btn btn-default">Right</button>
</div>

Answer 2

Bootstrap 4的正确解决方案(来自其迁移文档):

删除了.btn-group-justified.作为替代品,您可以使用<div class="btn-group d-flex" role="group"></div>作为元素的包装.w-100.

例:

<div class="btn-group d-flex" role="group" aria-label="...">
  <button type="button" class="btn btn-default w-100">Left</button>
  <button type="button" class="btn btn-default w-100">Middle</button>
  <button type="button" class="btn btn-default w-100">Right</button>
</div>

资料来源:https://getbootstrap.com/docs/4.0/migration/#button-group

Answer 3

您还可以使用 bootstrapbtn-block将跨越父级。

通过添加 . btn-block.

<button type="button" class="btn btn-primary btn-lg btn-block">Block level button</button>
<button type="button" class="btn btn-secondary btn-lg btn-block">Block level button</button>

https://getbootstrap.com/docs/4.0/components/buttons/

Answer 4

在Bootstrap 4中,使用.d-flex您.btn-group和您的.w-100个人按钮:

.btn-group.d-flex(role='group')
  button.w-100.btn.btn-lg.btn-success(type='button') 
  button.w-100.btn.btn-lg.btn-danger(type='button') 
  .btn-group(role='group')
    button#btnGroupDrop1.btn.btn-lg.btn-light.dropdown-toggle(type='button', data-toggle='dropdown')
      | •••
    .dropdown-menu
      a.dropdown-item(href='#') An option
      a.dropdown-item(href='#') Another option