javascript - 如何将移动菜单的内容居中？

Question

它们向左对齐，显然我不够聪明，无法解决这个问题。通常，我将如何更改其对齐方式？例如，居中？

此外，如果我想在屏幕小于 950 像素的情况下扩展每个元素的大小，我会在 CSS 的相关媒体查询部分下将其作为条件格式来执行，对吧？

$(document).ready(function() {
  $(document).bind("contextmenu", function(e) {
    if (e.target.nodeName == 'IMG') {
      //context menu attempt on top of an image element
      return false;
    }
  });
  //dropdown nav
  $("#nav").addClass("js");
  $("#nav").addClass("js").before('<div id="menu">☰</div>');
  $("#menu").click(function() {
    $("#nav").toggle();
  });
  $(window).resize(function() {
    if (window.innerWidth > 950) {
      $("#nav").removeAttr("style");
    }
  });
});

html,
body {
  font-family: Georgia, Times, "Times New Roman", serif;
  font-size: 12px;
  color: #c5e8ea;
  background-color: #000000;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased !important;
  text-shadow: 1px 1px 1px rgba(0, 0, 0, 0.004);
}

.hidden {
  display: none;
}

p {
  text-align: justify;
}

#header {
  position: fixed;
  margin: 0;
  padding: 4px;
  float: left;
  margin-top: 0px;
  z-index: 1;
}

#navmain {
  position: fixed;
  top: 0px;
  width: 100%;
  height: 75px;
  margin-top: 0px;
  font-family: 'Cedarville Cursive', cursive;
  font-size: 25px;
  color: #E5E5E5;
  background-color: #000000;
  box-shadow: ;
  padding: 0px;
  z-index: 1;
  opacity: .8;
}

h1 {
  margin: 0;
  margin-left: 15px;
  margin-top: 0px;
  padding: 0;
  float: left;
  opacity: ;
  color: #E5E5E5;
  text-shadow: 3px 3px 0 #000, -1px -1px 0 #000, 1px -1px 0 #000, -1px 1px 0 #000, 1px 1px 0 #000;
}

ul.navmain {
  list-style-type: none;
  margin: 0;
  padding: 0;
  overflow: hidden;
  float: right;
}

li.navmain {
  float: left;
}

a.navmain:link,
a.navmain:visited {
  display: block;
  height: 75px;
  width: 110px;
  font-family: 'Old Standard TT', serif;
  font-size: 23px;
  color: #E5E5E5;
  background-color: #000000;
  text-align: center;
  line-height: 95px;
  padding: 0px;
  text-decoration: none;
  text-transform: lowercase;
}

a.navmain:hover,
a.navmain:active {
  background-color: #181818;
}

.active {
  background-color: #0b0b0a;
}

#content1 {
  position: absolute;
  width: 100%;
  height: 100%;
  background-color: #000000;
  background-image: url("../img/bg.jpg");
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
  -webkit-animation: fadein 6s;
  /* Safari, Chrome and Opera > 12.1 */
  -moz-animation: fadein 6s;
  /* Firefox < 16 */
  -ms-animation: fadein 6s;
  /* Internet Explorer */
  -o-animation: fadein 6s;
  /* Opera < 12.1 */
  animation: fadein 6s;
}

@keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}


/* Firefox < 16 */

@-moz-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}


/* Safari, Chrome and Opera > 12.1 */

@-webkit-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}


/* Internet Explorer */

@-ms-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}


/* Opera < 12.1 */

@-o-keyframes fadein {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

#content2 {
  position: absolute;
  width: 60%;
  height: 100%;
  background-color: #000000;
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

#content2 h1 {
  margin-top: 95px;
  padding: 10px;
  font-size: 40px;
  font-family: 'Source Sans Pro', sans-serif;
}

#content2 p {
  margin-top: 10px;
  margin-left: 45px;
  margin-right: 45px;
  font-size: 16px;
  font-family: 'Source Sans Pro', sans-serif;
  float: left;
}

#content3 {
  float: right;
  width: 40%;
  height: 100%;
}

#content3 img {}

#footer {
  clear: both;
  height: 15px;
  font-family: 'Source Sans Pro', sans-serif;
  font-size: 12px;
  color: #E5E5E5;
  border-top: 1 px solid #efefef;
  padding: 8px 10px;
  line-height: 15px;
  background-color: #0b0b0a;
}

#footer a {
  color: #E5E5E5;
  text-decoration: none;
}

#footer a:hover {
  Color: #db6d16
}

#footer #altnav {
  width: 350px;
  float: right;
  text-align: right;
}


/* dropdown nav */

@media screen and (max-width: 950px) {
  #menu {
    width: 1.4em;
    display: block;
    background: ;
    font-size: 1.35em;
    text-align: center;
    float: right;
  }
  #nav.js {
    display: none;
  }
  ul {
    width: 100%;
    overflow: hidden;
    background-color: #000000;
  }
  li {
    width: 100%;
    border-right: none;
  }
  #content2 {
    position: absolute;
    width: 100%;
    height: 100%;
    background-color: #000000;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
  }
  #content2 h1 {
    margin-top: 95px;
    padding: 10px;
    font-size: 40px;
    font-family: 'Source Sans Pro', sans-serif;
  }
}

@media screen and (min-width: 950px) {
  #menu {
    display: none;
  }
}


/* dropdown nav */

<style>
  @import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:700');
</style>
<style>
  @import url('https://fonts.googleapis.com/css?family=Cedarville+Cursive');
</style>
<style>
  @import url('https://fonts.googleapis.com/css?family=Old+Standard+TT:400i');
</style>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>

<div id="navmain">
  <div id="header">
    <a href="#">
      <h1>Some Dude</h1>
    </a>
  </div>
  <ul class="navmain" id="nav">
    <li class="navmain"><a class="navmain" href="#">fauna</a></li>
    <li class="navmain"><a class="navmain" href="#">flora</a></li>
    <li class="navmain"><a class="navmain" href="#">scenic</a></li>
    <li class="navmain"><a class="navmain" href="#">urban</a></li>
    <li class="navmain"><a class="navmain" href="#">about</a></li>
    <li class="navmain"><a class="navmain" href="#">contact</a></li>
  </ul>
</div>
<div id="content1">
</div>

Answer 1

设置边距。

a.navmain:link, a.navmain:visited {
    margin: 0 auto;
}

新代码片段:

html, body{
font-family: Georgia, Times, "Times New Roman", serif;
font-size: 12px;
color: #c5e8ea;
background-color:#000000;
margin: 0;
padding: 0;
    -webkit-font-smoothing: antialiased !important;
    text-shadow: 1px 1px 1px rgba(0,0,0,0.004);


}


.hidden {
	display: none;
}

p {
	text-align: justify;
}


#header {
	position:fixed;
	margin: 0;
	padding: 4px;
	float: left;
	margin-top: 0px;
	z-index:1;
}

#navmain {
	position: fixed;
	top: 0px;
	width: 100%;
	height:75px;
	margin-top: 0px;
	font-family: 'Cedarville Cursive', cursive;
	font-size:25px;
	color:#E5E5E5;
	background-color: #000000;
	box-shadow: ;
	padding: 0px;
	z-index:1;
	opacity:.8;

}

h1 {
	margin:0;
	margin-left:15px;
	margin-top:0px;
	padding: 0;
	float: left;
	opacity:;
	color:#E5E5E5;
	text-shadow:
       3px 3px 0 #000,
     -1px -1px 0 #000,  
      1px -1px 0 #000,
      -1px 1px 0 #000,
       1px 1px 0 #000;
	
}


	ul.navmain {
		list-style-type: none;
		margin: 0;
		padding: 0;
		overflow: hidden;
		float:right;
	}

	li.navmain {
		float:left;
	}

	a.navmain:link,a.navmain:visited {
  margin: 0 auto;
		display:block;
		height:75px;
		width:110px;
		font-family: 'Old Standard TT', serif;
		font-size: 23px;
		color:#E5E5E5;
		background-color:#000000;
		text-align:center;
		line-height:95px;
		padding:0px;
		text-decoration:none;
		text-transform:lowercase;
		
	}

	a.navmain:hover,a.navmain:active {
		background-color:#181818;
	}

.active {
    background-color: #0b0b0a;
}




#content1 {
	position: absolute;
	width: 100%;
    height: 100%;
	background-color: #000000;
	background-image: url("../img/bg.jpg");
  	background-position: center center;
  	background-repeat: no-repeat;
  	background-attachment: fixed;
    background-size: cover;
	  -webkit-animation: fadein 6s; /* Safari, Chrome and Opera > 12.1 */
       -moz-animation: fadein 6s; /* Firefox < 16 */
        -ms-animation: fadein 6s; /* Internet Explorer */
         -o-animation: fadein 6s; /* Opera < 12.1 */
            animation: fadein 6s;
}

@keyframes fadein {
				from { opacity: 0; }
				to   { opacity: 1; }
			}

			/* Firefox < 16 */
			@-moz-keyframes fadein {
				from { opacity: 0; }
				to   { opacity: 1; }
			}

			/* Safari, Chrome and Opera > 12.1 */
			@-webkit-keyframes fadein {
				from { opacity: 0; }
				to   { opacity: 1; }
			}

			/* Internet Explorer */
			@-ms-keyframes fadein {
				from { opacity: 0; }
				to   { opacity: 1; }
			}

			/* Opera < 12.1 */
			@-o-keyframes fadein {
				from { opacity: 0; }
				to   { opacity: 1; }
			}			
			
#content2 {
	position:absolute;
	width: 60%;
    height: 100%;
	background-color: #000000;
  	background-position: center center;
  	background-repeat: no-repeat;
  	background-attachment: fixed;
    background-size: cover;
	
}

#content2 h1 {
	margin-top:95px;
	padding:10px;
	font-size: 40px;
	font-family: 'Source Sans Pro', sans-serif;	
}

#content2 p {
	margin-top:10px;
	margin-left:45px;
	margin-right:45px;	
	font-size: 16px;
	font-family: 'Source Sans Pro', sans-serif;
	float:left;
}

#content3 {
	float:right;
	width:40%;
	height:100%;
}

#content3 img {
	
}

#footer {
	clear: both;
	height: 15px;
	font-family: 'Source Sans Pro', sans-serif;
	font-size: 12px;
	color: #E5E5E5;
	
	border-top: 1 px solid #efefef;
	padding: 8px 10px;
	line-height: 15px;
	background-color:#0b0b0a;
}

#footer a {
	color: #E5E5E5;
	text-decoration: none;
}

#footer a:hover {
	Color: #db6d16
}

#footer  #altnav {
	width: 350px;
	float: right;
	text-align: right;
}

/* dropdown nav */
@media screen and (max-width: 950px) {
		#menu {
			width:1.4em;
			display: block;
			background:;
			font-size:1.35em;
			text-align: center;
			float:right;
		}
		#nav.js {
			display: none;
		}
		ul {
			width:100%;
			overflow: hidden;
			background-color:#000000;
		
		}
		li {
			width:100%;
			border-right:none;
		
		}
		#content2 {
			position:absolute;
			width: 100%;
			height: 100%;
			background-color: #000000;
			background-position: center center;
			background-repeat: no-repeat;
			background-attachment: fixed;
			background-size: cover;
			
		}

		#content2 h1 {
			margin-top:95px;
			padding:10px;
			font-size: 40px;
			font-family: 'Source Sans Pro', sans-serif;	
		}
}
	
@media screen and (min-width: 950px) {
		#menu {
			display: none;
		}
}
/* dropdown nav */

<!DOCTYPE html>
<html>
	<head>
		<title>| Home</title>
		<meta http-equiv="Content-Language" content="en-us" />
		<meta http-equiv="Content-type" content="text/html; charset=UTF-8" />
		<meta http-equiv="imagetoolbar" content="no" />
		<meta name="MSSmartTagsPreventParsing" content="true" />
		<meta name="viewport" content="width=device-width; initial-scale=1; maximum-scale=1">
		<style>@import url('https://fonts.googleapis.com/css?family=Source+Sans+Pro:700');</style>
		<style>@import url('https://fonts.googleapis.com/css?family=Cedarville+Cursive');</style>
		<style>@import url('https://fonts.googleapis.com/css?family=Old+Standard+TT:400i');</style>
		<style type="text/css" media="all">@import "css/master.css";</style> 
		<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
		<script type="text/javascript">
			$(document).ready(function(){
				$(document).bind("contextmenu",function(e){
					if(e.target.nodeName == 'IMG'){
						//context menu attempt on top of an image element
						return false;
					}
				});
				//dropdown nav
				$("#nav").addClass("js");
				$("#nav").addClass("js").before('<div id="menu">☰</div>');
				$("#menu").click(function(){
					$("#nav").toggle();
				});
				$(window).resize(function(){
					if(window.innerWidth > 950) {
						$("#nav").removeAttr("style");
					}
				});
			});
		</script>
	</head>	

	<body>
		
			<div id="navmain">
				<div id="header">
				<a href="#"><h1>Some Dude</h1></a>
				</div>
				<ul class="navmain" id="nav">
					<li class="navmain"><a class="navmain" href="#">fauna</a></li>
					<li class="navmain"><a class="navmain" href="#">flora</a></li>
					<li class="navmain"><a class="navmain" href="#">scenic</a></li>
					<li class="navmain"><a class="navmain" href="#">urban</a></li>
					<li class="navmain"><a class="navmain" href="#">about</a></li>
					<li class="navmain"><a class="navmain" href="#">contact</a></li>
				</ul>			
			</div>
			<div id="content1">
			</div>
	
	</body>
</html>