css显示模式_HTML_移动技术网

来来来,实现一个简单的布局.

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
	<style type="text/css">
		*{padding: 0px;margin: 0px;}
		.header
		{
			width: 980px;
			height: 100px;
			background: red;
			margin:auto;
			margin-bottom: 10px;
		}
		.content
		{
			width: 980px;
			height: 500px;
			background: green;
			margin: auto;
			margin-bottom: 10px;
		}
		.footer
		{
			width: 980px;
			height: 100px;
			background: blue;
			margin: auto;
		}
		.logo
		{
			width: 200px;height: 50px;background: pink;
			float: left;margin: 20px;
		}
		.nav
		{
			width: 600px;
			height: 50px;
			background: yellow;
			float: right;
			margin: 20px;
		}
		 .aside{
            width: 250px;
            height: 460px;
            background: purple;
            float: left;
            margin: 20px;
        }
        .article{
            width: 650px;
            height: 460px;
            background: deepskyblue;
            float: right;
            margin: 20px;
        }
	</style>
</head>
<body>
	<div class="header">
		<div class="logo"></div>
		<div class="nav"></div>
	</div>
	<div class="content">
		<div class="aside"></div>
		<div class="article"></div>
	</div>
	<div class="footer"></div>
</body>
</html>

效果图：
在这里插入图片描述

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
	<style type="text/css">
		span
		{
			color: red;
		}
	</style>
</head>
<body>
<div>我是div</div>
<div>我是div</div>
<span>我是span</span>
<span>我是span</span>
</body>
</html>

其特点:
div和span有什么区别?
div会单独的占领一行,而span不会单独占领一行
div是一个容器级的标签, 而span是一个文本级的标签
容器级的标签中可以嵌套其它所有的标签
文本级的标签中只能嵌套文字/图片/超链接
容器级的标签
div h ul ol dl li dt dd …
文本级的标签
span p buis strong em ins del …

行内与块级的区别:

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>Document</title>
	<style type="text/css">
		div{
            background: red;
            width: 200px;
            height: 200px;
        }
        span{
            background: blue;
            width: 200px;
            height: 200px;
        }
         img{
            width: 50px;
            height: 50px;
        }
	</style>
</head>
<body>
	<div>我是div</div>
<p>我是段落</p>
<h1>我是标题</h1>
<hr>
<span>我是span</span>
<b>我是加粗</b>
<strong>我是强调</strong>
<hr>
<img src="images/picture.jpg" alt="">
<img src="images/picture.jpg" alt="">
</body>
</html>

注意点:
特点：
优点：行内不会独占一行.行内元素的宽度高度等于文字的宽高与高度.
缺点：（不可以设置width与height）.
特点：
优点：可以设置宽高,
缺点：块级元素会独占一行
因为这些缺点.创造了行内块级标签:
特点在于不会独占一行,又能设置宽高.

在这里插入图片描述

CSS元素显示模式转换；


```css
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>31-CSS元素显示模式转换</title>
    <style>
        div{
            display: inline;
            background: red;
            width: 200px;
            height: 200px;
        }
        span{
            display: block;
            background: green;
            width: 200px;
            height: 200px;
        }
        .cc{
            background: blue;
            width: 200px;
            height: 200px;
            display: inline-block;
        }
    </style>
</head>
<body>


<div>我是div</div>
<div>我是div</div>

<span>我是span</span>
<span>我是span</span>

<p class="cc">我是段落</p>
<b class="cc">我是加粗</b>

</body>
</html>