javascript - 试图将我的导航栏和汉堡包图标居中

Question

所以基本上我有一个向左浮动的导航栏。该页面是响应式的，因此当屏幕低于某个尺寸时，导航栏会消失(主页链接除外)，并且会在右侧弹出一个汉堡包下拉菜单。我想做的是弄清楚如何使导航栏居中并在屏幕尺寸减小时让它完全消失，并且汉堡包图标出现并在屏幕上居中。

HTML:

<div class="topnav" id="myTopnav">  
<nav>

  <a href="home.html">Home</a>  
  <a href="history.html">History</a>  
  <a href="information.html">Information</a>  
  <a href="gallery.html">Gallery</a>
  <a href="videos.html">Videos</a>
  <a href="exercises.html">Exercises</a>
  <a href="contact.html">Contact</a> 
  <a href="links.html">Links</a>  
  <a href="javascript:void(0);" class="icon" onclick="myFunction()">&#9776;</a>

</nav>
</div>

CSS:

/* Add a black background color to the top navigation */
.topnav {
background-color: #000000;
overflow: hidden;
}

/* Style the links inside the navigation bar */
.topnav a {
float: left;
display: block;
color: #FFFFFF;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 2.25em;
margin-bottom: 1.25%; 
}

/* Change the color of links on hover */
.topnav a:hover {
background-color: #2C3539;
color: #FFFFFF;
}

/* 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;
}

/* When the screen is less than 600 pixels wide, hide all links, except for 
the first one ("Home"). Show the link that contains should open and close 
the topnav (.icon) */
@media screen and (max-width: 600px) {
.topnav a:not(:first-child) {display: none;}
.topnav a.icon {
float: right;
display: block;
}
}

/* 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.responsive {position: relative;}
.topnav.responsive a.icon {
position: absolute;
right: 0;
top: 0;
}
.topnav.responsive a {
float: none;
display: block;
text-align: left;
}
}

Javascript:

<script>
/* Toggle between adding and removing the "responsive" class to topnav when 
the user clicks on the icon */
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
    x.className += " responsive";
} else {
    x.className = "topnav";
}
}
</script>

如有任何帮助，我们将不胜感激!

Answer 1

Removing floats and display: block, and using inline-block may fix your problems

display: inline-block;

您的新代码:

/* Add a black background color to the top navigation */
.topnav {
background-color: #000000;
overflow: hidden;
}

/* Style the links inside the navigation bar */
.topnav a {
display: inline-block;
color: #FFFFFF;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 2.25em;
margin-bottom: 1.25%; 
}

/* Change the color of links on hover */
.topnav a:hover {
background-color: #2C3539;
color: #FFFFFF;
}

:D