响应的导航顺序在进入移动媒体查询时反转

Question

我正在尝试使用w3c示例中的徽标创建响应式导航。但是，我遇到了导航问题。当我将元素浮动到页面右侧时，导航项的顺序混乱。我已经在桌面版上重新订购了它们，但我似乎无法在移动导航中正确订购它们。我尝试过使用浮动，但这只是弄乱了下拉列表的样式。

    </head>
<body>
<div id="container">
<nav class="topnav" id="myTopnav">
   <img src="img/logo.png" alt="Logo">
         <a href="#home" class="active">Home</a>
            <a href="#contact">Contact</a>
            <a href="#news">News</a>
            <a href="javascript:void(0);" class="icon" onclick="myFunction()">&#9776;</a>
</nav>

</body>
</html>

CSS

  html{
    min-height:100%;
}

body{
    margin:0 auto;
    padding:0;
    font-family: 'Roboto', sans-serif;
    height:100%;
    width:100%;
}

#container{
    margin:0 auto;
    height:100%;
    width:100%;
/* min-height:100%;*/
/*   position:relative;*/
}


/* Add a black background color to the top navigation */
.topnav {
    background-color: #333;
    overflow: hidden;
padding-left:20%;
    padding-right:20%;
    margin:0 auto;
}


.topnav img{
    float:left;
    padding-top:5px;
    padding-bottom:5px;
    padding-left:5px;
    display: inline-block;
    padding-right:40px;


}

/* Style the links inside the navigation bar */
.topnav a {
    float: right;
/*    position: relative;*/
    display: inline;
/*    display: inline-block;*/
    color: #f2f2f2;
      padding: 14px 16px;
    text-decoration: none;
    font-size: 17px;
}

/* Change the color of links on hover */
.topnav a:hover {
    background-color: #ddd;
    color: black;
}

/* Add an active class to highlight the current page */
.active {
    background-color: #4CAF50;
    color: white;
}

/* Hide the link that should open and close the topnav on small screens */
.topnav .icon {
    display: none;
}



/* The "responsive" class is added to the topnav with JavaScript when the user clicks on the icon. This class makes the topnav look good on small screens (display the links vertically instead of horizontally) */
@media screen and (max-width: 600px) {

    .topnav {
        background-color: #333;
    overflow: hidden;
padding: 0;
    margin:0 auto;
/*      clear: both;*/
}


  .topnav.responsive {
        position: relative;
        height:210px; 

    }

  .topnav.responsive a.icon {
    position: absolute;
    right: 0;
    top: 0;
  }
  .topnav.responsive a {
        clear: both;
/*      position: relative;*/
        top:0px;
/*      height:100%;*/
    float: none;
    display: block;
/*    text-align: center;*/
  }

  .topnav a {
        display: none;
    }

  .topnav a.icon {
    float: right;
    display: block;
  } 


}

JS

    function myFunction() {
    var x = document.getElementById("myTopnav");
    if (x.className === "topnav") {
        x.className += " responsive";
    } else {
        x.className = "topnav";
    }
}

Answer 1

另一答案