Boostrap 4菜单背景颜色在电话上

Question

我有bootstrap 4导航栏的问题，我想改变手机上的背景颜色（只有放置链接的地方），标题是蓝色的。

HTML代码：

      <nav class="navbar navbar-expand-lg navbar-dark bg-dark fixed-top ">
  <div class="container"> <ul class="nav navbar-nav navbar-logo mx-auto">
  <li class="nav-item">
    <a class="nav-link" href="index.php"><img src="logo.svg" class="img-fluid logo"/></a>
  </li>
</ul>        <button class="navbar-toggler order-first" type="button" data-toggle="collapse" data-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation" >
      <span class="custom-toggler navbar-toggler-icon"></span>
    </button>
    <div class="collapse navbar-collapse" id="navbarResponsive">
      <ul class="navbar-nav ml-auto">
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="#">link1</a>
        </li>
        <li class="nav-item">
          <a class="nav-link js-scroll-trigger" href="#">link2</a>
        </li>
      </ul>
    </div>
</nav>

示例我希望如何获得

提前感谢您的帮助！

Answer 1

.navbar-collapse {
background: #333;
margin: -.5rem -1rem;
padding: .5rem 1rem;
}

Answer 2

@media only screen and (max-width: 800px) {
  .navbar-collapse {
    background: #eeefef;
  }
}

根据可以切换菜单的宽度，您应该更改 max-width 属性。