html - 移动导航菜单在媒体查询收缩时显示和隐藏

Question

如果您查看代码，当缩小页面时，菜单会快速显示然后滑回。我希望它在页面缩小时根本不显示。我不明白为什么会这样。

我认为在 #nav 而不是 input[type="checkbox"]:checked + #nav 上的转换可能是 smth，但我需要有动画在#nav。我有一个单独的文件，我只是为了移动导航而玩的，它运行良好。当我开始使用媒体查询时，事情就变糟了。

这是 fiddle : https://jsfiddle.net/reizer/fwzsxrnt/

* {margin:0;padding:0;border:0;list-style:none;font-size:100%;font:inherit;vertical-align:baseline;}
/*RESET*/
body {font: 1em Arial, Helvetica, sans-serif;}
#wrapper {
	max-width: 960px;
	margin: auto;
}
#nav {
	display: block;
	max-height: 0em;
	overflow: hidden;
	transition: max-height 0.5s ease;
	-webkit-transition: max-height 0.5s ease;
	-moz-transition: max-height 0.5s ease;
	-o-transition: max-height 0.5s ease;
}
input[type="checkbox"] {
	position: absolute;
	margin-top: -100em;
}
input[type="checkbox"]:checked + #nav{
	max-height: 20em;
}
label {
	background: #9c0;
	cursor: pointer;
	display: block;
	overflow: auto;
	padding-left: 1em;
	background-color: #9C0;
	background: -moz-linear-gradient(top,  #99cc00 0%, #85b100 100%);
	background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#99cc00), color-stop(100%,#85b100));
	background: -webkit-linear-gradient(top,  #99cc00 0%,#85b100 100%);
	background: -o-linear-gradient(top,  #99cc00 0%,#85b100 100%);
	background: -ms-linear-gradient(top,  #99cc00 0%,#85b100 100%);
	background: linear-gradient(to bottom,  #99cc00 0%,#85b100 100%);
	filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#99cc00', endColorstr='#85b100',GradientType=0 );
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	-khtml-user-select: none;
	-moz-user-select: none;
	-ms-user-select: none;
	user-select: none;
	color: #FFF;
	font-size: 1.6em;
	line-height: 2.6em;
}
label:after   {
	content: "\f039";
	float: right;
	background-color: #669900;
	padding: 0.2em 0.3em 0.1em;
	margin: 0.5em;
	font: 1.2em FontAwesome;
	border-radius: 0.3em;
	-webkit-box-shadow: inset 0em 0.1em 0.2em 0em rgba(0,0,0,0.3);
	-moz-box-shadow: inset 0em 0.1em 0.2em 0em rgba(0,0,0,0.3);
	box-shadow: inset 0em 0.1em 0.2em 0em rgba(0,0,0,0.3);
}

#nav ul li a {
	background: #690;
	border: solid #90c12f;
	border-width: 1px 0 0;
	text-decoration: none;
	padding: 1em;
	display: block;
	color: #FFF;
}
#nav ul li a:hover, #nav ul li a:active {
	background: #abd728;	
}
@media screen and (min-width: 479px) {
.d----onttouchshituntilthispoin----t {
}
label {
	display:none;
}
#nav {
	display: table;
	width: 100%;
	max-height: 20em;
	overflow: auto;
}
#nav ul {
	display: table-row;
}
#nav ul li {
	display: table-cell;
}
#nav ul li a {
	color: #000;
	position: relative;
	text-align: center;
	text-indent: 20px;
	border: solid #000;
	border-width: 0 1px 0 0;
	line-height: 3.4em;
	padding: 0px 20px 0px 0px;
	transition: all 0.5s ease;
	-webkit-transition: all 0.5s ease;
	-o-transition: all 0.5s ease;
	-moz-transition: all 0.5s ease;
} #nav ul li:last-child a{border:none}
#nav ul li a:hover {
	position: relative;
	text-indent: 0px;
	padding-right: 40px;
}
#nav ul li a:before {
	font-family: FontAwesome;
	content: "\f078";
	position: absolute;
	right: 1em;
	margin-top: -0.85em;
	visibility: hidden;
	opacity: 0;
	-webkit-transition: all 0.5s ease;
	transition: all 0.5s ease;
	-o-transition: all 0.5s ease;
	-moz-transition: all 0.5s ease;
}
#nav ul li a:hover:before {
	margin-top: 0em;
	visibility: visible;
	opacity: 1;
}

#nav ul li a ul li {
	position: absolute;
	background: #FF0;
	display: block;
	width: 100%;
	height: 0em;
	visibility: hidden;
	opacity: 0;
	border-radius: 0px 0px 5px 5px;
	-moz-border-radius: 0px 0px 5px 5px;
	-webkit-border-radius: 0px 0px 5px 5px;
	-webkit-transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
	transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
	-o-transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
	-moz-transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
}
#nav ul li a:hover ul li {
	visibility: visible;
	opacity: 1;
	height: 1em;
	-webkit-transition:height 0.5s ease;
	transition:height 0.5s ease;
	-o-transition:height 0.5s ease;
	-moz-transition:height 0.5s ease;
}

<div id="wrapper"><div id="logo"></div><label for="toggle">menu</label>
<input type="checkbox" id="toggle">
<div id="nav">
   <ul>
      <li><a href="#">Home<ul><li></li></ul></a></li>
      <li><a href="#">About<ul><li></li></ul></a></li>
      <li><a href="#">Products<ul><li></li></ul></a></li>
      <li><a href="#">FAQ<ul><li></li></ul></a></li>
      <li><a href="#">Support<ul><li></li></ul></a></li>
      <li><a href="#">Contact<ul><li></li></ul></a></li>
   </ul>
</div>
test
</div>

Answer 1

只需从媒体查询的 #nav 中删除 max-height: 20em;。

JSFiddle Here

* {
  margin: 0;
  padding: 0;
  border: 0;
  list-style: none;
  font-size: 100%;
  font: inherit;
  vertical-align: baseline;
}
/*RESET*/

body {
  font: 1em Arial, Helvetica, sans-serif;
}
#wrapper {
  max-width: 960px;
  margin: auto;
}
#nav {
  display: block;
  max-height: 0em;
  overflow: hidden;
  transition: max-height 0.5s ease;
  -webkit-transition: max-height 0.5s ease;
  -moz-transition: max-height 0.5s ease;
  -o-transition: max-height 0.5s ease;
}
input[type="checkbox"] {
  position: absolute;
  margin-top: -100em;
}
input[type="checkbox"]:checked + #nav {
  max-height: 20em;
}
label {
  background: #9c0;
  cursor: pointer;
  display: block;
  overflow: auto;
  padding-left: 1em;
  background-color: #9C0;
  background: -moz-linear-gradient(top, #99cc00 0%, #85b100 100%);
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #99cc00), color-stop(100%, #85b100));
  background: -webkit-linear-gradient(top, #99cc00 0%, #85b100 100%);
  background: -o-linear-gradient(top, #99cc00 0%, #85b100 100%);
  background: -ms-linear-gradient(top, #99cc00 0%, #85b100 100%);
  background: linear-gradient(to bottom, #99cc00 0%, #85b100 100%);
  filter: progid: DXImageTransform.Microsoft.gradient(startColorstr='#99cc00', endColorstr='#85b100', GradientType=0);
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  color: #FFF;
  font-size: 1.6em;
  line-height: 2.6em;
}
label:after {
  content: "\f039";
  float: right;
  background-color: #669900;
  padding: 0.2em 0.3em 0.1em;
  margin: 0.5em;
  font: 1.2em FontAwesome;
  border-radius: 0.3em;
  -webkit-box-shadow: inset 0em 0.1em 0.2em 0em rgba(0, 0, 0, 0.3);
  -moz-box-shadow: inset 0em 0.1em 0.2em 0em rgba(0, 0, 0, 0.3);
  box-shadow: inset 0em 0.1em 0.2em 0em rgba(0, 0, 0, 0.3);
}
#nav ul li a {
  background: #690;
  border: solid #90c12f;
  border-width: 1px 0 0;
  text-decoration: none;
  padding: 1em;
  display: block;
  color: #FFF;
}
#nav ul li a:hover,
#nav ul li a:active {
  background: #abd728;
}
@media screen and (min-width: 479px) {
  .d----onttouchshituntilthispoin----t {} label {
    display: none;
  }
  #nav {
    display: table;
    width: 100%;
    overflow: auto;
  }
  #nav ul {
    display: table-row;
  }
  #nav ul li {
    display: table-cell;
  }
  #nav ul li a {
    color: #000;
    position: relative;
    text-align: center;
    text-indent: 20px;
    border: solid #000;
    border-width: 0 1px 0 0;
    line-height: 3.4em;
    padding: 0px 20px 0px 0px;
    transition: all 0.5s ease;
    -webkit-transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
  }
  #nav ul li:last-child a {
    border: none
  }
  #nav ul li a:hover {
    position: relative;
    text-indent: 0px;
    padding-right: 40px;
  }
  #nav ul li a:before {
    font-family: FontAwesome;
    content: "\f078";
    position: absolute;
    right: 1em;
    margin-top: -0.85em;
    visibility: hidden;
    opacity: 0;
    -webkit-transition: all 0.5s ease;
    transition: all 0.5s ease;
    -o-transition: all 0.5s ease;
    -moz-transition: all 0.5s ease;
  }
  #nav ul li a:hover:before {
    margin-top: 0em;
    visibility: visible;
    opacity: 1;
  }
  #nav ul li a ul li {
    position: absolute;
    background: #FF0;
    display: block;
    width: 100%;
    height: 0em;
    visibility: hidden;
    opacity: 0;
    border-radius: 0px 0px 5px 5px;
    -moz-border-radius: 0px 0px 5px 5px;
    -webkit-border-radius: 0px 0px 5px 5px;
    -webkit-transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
    transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
    -o-transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
    -moz-transition: height 0.5s ease, opacity 0.0s ease 0.5s, visibility 0.0s ease 0.5s;
  }
  #nav ul li a:hover ul li {
    visibility: visible;
    opacity: 1;
    height: 1em;
    -webkit-transition: height 0.5s ease;
    transition: height 0.5s ease;
    -o-transition: height 0.5s ease;
    -moz-transition: height 0.5s ease;
  }

<div id="wrapper">
  <div id="logo"></div>
  <label for="toggle">menu</label>
  <input type="checkbox" id="toggle">
  <div id="nav">
    <ul>
      <li><a href="#">Home<ul><li></li></ul></a>
      </li>
      <li><a href="#">About<ul><li></li></ul></a>
      </li>
      <li><a href="#">Products<ul><li></li></ul></a>
      </li>
      <li><a href="#">FAQ<ul><li></li></ul></a>
      </li>
      <li><a href="#">Support<ul><li></li></ul></a>
      </li>
      <li><a href="#">Contact<ul><li></li></ul></a>
      </li>
    </ul>
  </div>
  test
</div>