css去掉虚线框

/* 移除所有元素的虚线框 */
* {
  outline: none;
}

/* 或者针对特定元素移除虚线框 */
button:focus, input:focus {
  outline: none;
}

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Remove Dashed Outline</title>
  <style>
    /* 移除所有元素的虚线框 */
    * {
      outline: none;
    }

    /* 或者针对特定元素移除虚线框 */
    button:focus, input:focus {
      outline: none;
    }
  </style>
</head>
<body>
  <form>
    <input type="text" placeholder="Enter text here">
    <button type="submit">Submit</button>
  </form>
</body>
</html>