请用 HTML5/CSS3 实现一个双栏布局,顶部有导航栏,底部有网站简介。
要求如下:
- PC 上,侧边栏在左侧,宽度固定,主内容在右侧,宽度自适应,内容区域高度不定
- 手机上,所有区域竖排,依次是内容、导航、侧边栏、底部(假定宽度低于 480px 的设
备是手机)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>双栏布局</title>
<style>
html, body {
width: 100%;
height: 100%;
border: 0;
margin: 0;
}
nav, footer {
width: 100%;
height: 100px;
background-color: #7ecef3;
}
main {
min-height: calc(100% - 200px);
display: flex;
}
main #left {
width: 200px;
background-color: #89c997;
}
main #content {
flex: 1;
background-color: #53b9be;
}
@media (max-width: 480px) { /*宽度小于480的设备*/
main {
flex-direction: column;
}
main #left {
width: 100%;
}
}
</style>
</head>
<body>
<nav>导航栏</nav>
<main>
<div id="left">侧边栏</div>
<div id="content">主要内容</div>
</main>
<footer>简介简介</footer>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0 user-scalable=no" >
<title>Document</title>
<style>
/* html,body{
width: 100%;
height: 100%;
margin: 0;
padding: 0;
} */
nav,footer{
width: 100%;
height: 100px;
background-color: beige;
}
aside{
float: left;
width: 200px;
height: 400px;
min-height: calc(100% - 200px);
background-color: blueviolet;
}
main{
/* width: calc(100% - 200px); */
height: 400px;
min-height: calc(100% - 200px);
background-color: brown;
overflow: hidden;
}
@media (max-width:780px) {
body{
display: flex;
flex-direction: column;
}
main{
order: 1;
min-height: auto;
}
nav{
order: 2;
}
aside{
order: 3;
width: auto;
}
footer{
order: 4;
}
}
</style>
</head>
<body>
<nav>导航栏</nav>
<aside>侧边栏</aside>
<main>主要内容</main>
<footer>底部</footer>
</body>
</html> <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width,initial-scale=1.0" >
<meta http-equiv="X-UA-Compatible" content="ie=idge">
<title></title>
<script type="text/javascript">
var str=new String("hello1");
var str1=String("hello2");
var str2="";
//alert(str.charCodeAt(1));
var result=str.concat(str1);
// alert(result);
var s=str.indexOf("hec",0);
//alert(s);
var stri="how are are you";
//alert(stri.replace(/are/ig,"mibing"));
//alert(stri.substring(0,5));
//alert(stri.split(""));
//alert(stri.toLowerCase());
//alert(stri.toUpperCase());
</script>
<style type="text/css">
*{
margin: 0;
border: 0;
}
nav,footer{
background-color: #7ecef3;
width: 100%;
height: 100%;
}
main{
display:flex;
}
main (2048)#left{
width: 300px;
background-color: #89c997;
}
main (2049)#content
{
flex: 1;
background-color: #53b9be;
}
@media (max-width: 480px) {
main
{
flex-direction: column;
}
main (2050)#left
{
width: 100%;
}
}
</style>
</head>
<body>
<nav>导航栏</nav>
<main>
<div id="left">侧边栏</div>
<div id="content">主要内容</div>
</main>
<footer>
底部
</footer>
</body>
</html> <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
</head>
<style>
*{
padding: 0px;
margin: 0px;
}
#content{
display: flex;
flex-flow: row wrap;
}
#left{
width: 200px;
background-color: salmon;
}
#right{
height: 1000px;
min-width: 240px;
flex-grow: 1;
background-color: seagreen;
}
@media (max-width: 480px) {
#left{
flex-grow: 1;
}
}
</style>
<body>
<div id="nav" style="width:100%; height: 100px; text-align: center; font-size: 14px; background-color: #53b9be;">
这是一个导航栏
</div>
<div id="content">
<div id="left">我是左侧</div>
<div id="right"></div>
</div>
<footer style="width:100%; height: 100px; text-align: center; font-size: 14px; background-color: #53b9be;">
这是我的脚丫子,主要是网站简介
</footer>
</body>
</html>