css - Bootstrap 自定义导航栏形状

Question

我想制作一个自定义导航栏形状，如下图所示。

对于这个形状，我使用了以下 CSS：

.navbar-nav.nav-bar-custom {
    transform: skew(-21deg);
    border: 1px solid black;
}

但是当我使用它时，我所有的文字看起来都是斜体的。见附图。

谁能帮我解决这个问题？

标签： csshtmlbootstrap-4

Answer 1

您可以为此使用伪元素。伪选择器本身就是一个元素，所以它不会影响<nav>.

的HTML

<nav class="navbar navbar-expand-lg navbar-dark bg-color">
  <a class="navbar-brand" href="#">Navbar</a>
  <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="navbarSupportedContent">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active">
        <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Link</a>
      </li>
      <li class="nav-item dropdown">
        <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          Dropdown
        </a>
        <div class="dropdown-menu" aria-labelledby="navbarDropdown">
          <a class="dropdown-item" href="#">Action</a>
          <a class="dropdown-item" href="#">Another action</a>
          <div class="dropdown-divider"></div>
          <a class="dropdown-item" href="#">Something else here</a>
        </div>
      </li>
      <li class="nav-item">
        <a class="nav-link disabled" href="#">Disabled</a>
      </li>
    </ul>
    <form class="form-inline my-2 my-lg-0">
      <input class="form-control mr-sm-2" type="search" placeholder="Search" aria-label="Search">
      <button class="btn btn-outline-dark my-2 my-sm-0" type="submit">Search</button>
    </form>
  </div>
</nav>

和 SCSS

.navbar {
  margin-top: 10px;
}
.bg-color {
  padding: 10px 45px;
  &::before {
    border-top-left-radius: 10px;
    border-bottom-right-radius: 10px;
    transform: skew(-21deg);
    display: block;
    content: "";
    background-color: rgb(240, 140, 60);
    position: absolute;
    left: 20px;
    right: 20px;
    top: 0;
    bottom: 0;
    z-index: -1;
  }
}

或查看笔：https ://codepen.io/aboutandre/pen/WmjENX

您可以在MDN上阅读更多关于伪元素的信息。