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css - 当它被点击时，它周围有默认的奇怪边框，如何删除它？

问题描述

当它被点击时，它周围有默认的奇怪边框，如何删除它？我正在使用 Bootstrap，我尝试检查并查看为什么边界不会消失

我能够删除没有单击或其他任何东西时存在的边框，但是单击它时会出现轮廓/边框。不知道怎么去掉在此处输入图像描述

文件

    <!doctype html>
<html lang="en">

<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <!-- Bootstrap CSS -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet"
    integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

  <!-- CSS -->
  <link href="style.css" rel="stylesheet">

  <!-- Font Awesome Link -->
  <script src="https://kit.fontawesome.com/c0ad3a43c4.js" crossorigin="anonymous"></script>
  <title>Priyanka Giri</title>
</head>

<body>
  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <div class="container-fluid">
      <a class="navbar-brand" href="#"><i class="fas fa-home"></i></a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
        <i class="fas fa-bars"></i>
      </button>
      <div class="collapse navbar-collapse" id="navbarNav">
        <ul class="navbar-nav">
          <li class="nav-item">
            <a class="nav-link active" aria-current="page" href="#">Home</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Features</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Pricing</a>
          </li>
        </ul>
      </div>
    </div>
  </nav>

  <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.10.2/dist/umd/popper.min.js"
    integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" crossorigin="anonymous">
  </script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.min.js"
    integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13" crossorigin="anonymous">
  </script>
  <script src="script.js"></script>

</body>

</html>

CSS文件：

/* Navigation Bar */
.navbar-toggler{
    border: 0;
    background-color: none;
    color: rgb(0, 0, 0);
}

.navbar-toggler: active {
    border: 0;
}

标签： csstwitter-bootstrap

解决方案

尝试：

.navbar-toggler:focus {
  box-shadow: none !important;
}


/* Navigation Bar */
.navbar-toggler{
    border: 0;
    background-color: none;
    color: rgb(0, 0, 0);
}

.navbar-toggler:focus {
    box-shadow: none !important;
}
<html lang="en">

<head>
  <!-- Required meta tags -->
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">

  <!-- Bootstrap CSS -->
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/css/bootstrap.min.css" rel="stylesheet"
    integrity="sha384-1BmE4kWBq78iYhFldvKuhfTAU6auU8tT94WrHftjDbrCEXSU1oBoqyl2QvZ6jIW3" crossorigin="anonymous">

  <!-- CSS -->
  <link href="style.css" rel="stylesheet">

  <!-- Font Awesome Link -->
  <script src="https://kit.fontawesome.com/c0ad3a43c4.js" crossorigin="anonymous"></script>
  <title>Priyanka Giri</title>
</head>

<body>
  <nav class="navbar navbar-expand-lg navbar-light bg-light">
    <div class="container-fluid">
      <a class="navbar-brand" href="#"><i class="fas fa-home"></i></a>
      <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation">
        <i class="fas fa-bars"></i>
      </button>
      <div class="collapse navbar-collapse" id="navbarNav">
        <ul class="navbar-nav">
          <li class="nav-item">
            <a class="nav-link active" aria-current="page" href="#">Home</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Features</a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Pricing</a>
          </li>
        </ul>
      </div>
    </div>
  </nav>

  <script src="https://cdn.jsdelivr.net/npm/@popperjs/core@2.10.2/dist/umd/popper.min.js"
    integrity="sha384-7+zCNj/IqJ95wo16oMtfsKbZ9ccEh31eOz1HGyDuCQ6wgnyJNSYdrPa03rtR1zdB" crossorigin="anonymous">
  </script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.1.3/dist/js/bootstrap.min.js"
    integrity="sha384-QJHtvGhmr9XOIpI6YVutG+2QOK9T+ZnN4kzFN1RtK3zEFEIsxhlmWl5/YESvpZ13" crossorigin="anonymous">
  </script>
  <script src="script.js"></script>

</body>

</html>

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