twitter-bootstrap – 删除“nav-tabs”圆角(Bootstrap)

将此行添加到CSS

.nav-tabs > li > a {
-webkit-border-radius: 0;
-moz-border-radius: 0;
border-radius: 0;
}

或者在你的情况下：

.nab-tabs > li > a {
-webkit-border-radius: 0;
-moz-border-radius: 0;
border-radius: 0;
}

编辑：21-03-2018

在BS4.0中有另一种方法添加圆形-0官方 bootstrap override , here is the working example ：

<div class="container">
  <div class="row">
    <div class="col-8 ml-auto mr-auto my-5 ">
      <ul class="nav nav-tabs ">
        <li class="nav-item ">
          <a class="nav-link active rounded-0" href="#">Active</a>
        </li>
        <li class="nav-item">
          <a class="nav-link rounded-0" href="#">Link</a>
        </li>
        <li class="nav-item">
          <a class="nav-link rounded-0" href="#">Link</a>
        </li>
        <li class="nav-item">
          <a class="nav-link rounded-0 disabled" href="#">Disabled</a>
        </li>
      </ul>
    </div>
  </div>
</div>