html - 如何将按钮移到左侧？

Question

我正在使用 bootstrap 文档中的这个 modalExample

<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">Open modal</button>

<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">New message</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <form>
          <div class="form-group">
            <label for="recipient-name" class="col-form-label">Recipient:</label>
            <input type="text" class="form-control" id="recipient-name">
          </div>
          <div class="form-group">
            <label for="message-text" class="col-form-label">Message:</label>
            <textarea class="form-control" id="message-text"></textarea>
          </div>
        </form>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-primary">Send message</button>
      </div>
    </div>
  </div>
</div>

如何将“发送消息”按钮移动到左侧而不是默认情况下的右侧？
我尝试过诸如 text-left 之类的东西或 position-left在 class=""等 .. 对我没有任何作用
谢谢!

Answer 1

只需添加 justify-content: flex-start !important至 .modal-footer .
由于 Bootstrap 使用 justify-content: flex-end要将按钮定位在页脚的左侧，上面的规则是在 !important 旁边的规则。 , 可以覆盖原来的Bootstrap的样式，把按钮移到左边。

.modal-footer {
  justify-content: flex-start !important;
}

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

<button type="button" class="btn btn-primary" data-toggle="modal" data-target="#exampleModal">Open modal</button>

<div class="modal fade" id="exampleModal" tabindex="-1" role="dialog" aria-labelledby="exampleModalLabel" aria-hidden="true">
  <div class="modal-dialog" role="document">
    <div class="modal-content">
      <div class="modal-header">
        <h5 class="modal-title" id="exampleModalLabel">New message</h5>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div>
      <div class="modal-body">
        <form>
          <div class="form-group">
            <label for="recipient-name" class="col-form-label">Recipient:</label>
            <input type="text" class="form-control" id="recipient-name">
          </div>
          <div class="form-group">
            <label for="message-text" class="col-form-label">Message:</label>
            <textarea class="form-control" id="message-text"></textarea>
          </div>
        </form>
      </div>
      <div class="modal-footer">
        <button type="button" class="btn btn-primary">Send message</button>
      </div>
    </div>
  </div>
</div>

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