JS、CSS实现HTML自适应网页顶部top导航样式示例
HTML:
<div class="topnav" id="myTopnav">
<a href="#home">首页</a>
<a href="#news">产品</a>
<a href="#news">新闻</a>
<a href="#contact">联系方式</a>
<a href="#about">关于我们</a>
<a href="javascript:void(0);" style="font-size:15px;" class="icon" οnclick="myFunction()">☰</a>
</div>
<div style="padding-left:16px">
<h2>js、css 响应式导航实例</h2>
<p>浏览器打开,改变此网页全屏状态查看效果</p>
</div>
css:
body {margin:0;}
.topnav {
overflow: hidden;
background-color: #333;
}
.topnav a {
float: left;
display: block;
color: #f2f2f2;
text-align: center;
padding: 14px 16px;
text-decoration: none;
font-size: 17px;
}
.topnav a:hover {
background-color: #ddd;
color: black;
}
.topnav .icon {
display: none;
}
@media screen and (max-width: 600px) {
.topnav a:not(:first-child) {display: none;}
.topnav a.icon {
float: right;
display: block;
}
}
@media screen and (max-width: 600px) {
.topnav.responsive {position: relative;}
.topnav.responsive .icon {
position: absolute;
right: 0;
top: 0;
}
.topnav.responsive a {
float: none;
display: block;
text-align: left;
}
}
js:
function myFunction() {
var x = document.getElementById("myTopnav");
if (x.className === "topnav") {
x.className += " responsive";
} else {
x.className = "topnav";
}
}