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Detailed examples of background applications of Html5
- 零到壹度Original
- 2018-04-08 10:09:332208browse
This article mainly introduces the background attributes of Html5. The editor thinks it is quite good. Now I will share it with you and give it as a reference. Let’s follow the editor and take a look.
1. Review of background attributes:
background-image
background-color
background-repeat
background-position
background-attachment
2. New attributes:
background-size:
background-size:x y; // Horizontal and vertical dimensions, pixels/percentage/auto/⋯
background-size :cover; //Keep the aspect ratio unchanged, ensuring that the box is filled, but not guaranteed to be able to see everything
background-size:contain; //Keeping the aspect ratio unchanged, guaranteed to be visible The entire image is clear, but it may not occupy the box
Multiple backgrounds:
background-image:url(1.jpg),url(2.jpg) ;
background-origin Background area positioning
border-box: Display the background starting from the border area
padding-box: starting from padding Area starts to display the background
content-box: starts to display the background from the content area
background-clip background drawing area
border-box: start drawing the background from the border area
padding-box: start drawing the background from the padding area
content-box: start displaying the background from the content area
3. Background exercise code part:
<!DOCTYPE HTML>
<html>
<head>
<title>your title name</title>
<meta charset="utf-8">
<meta name="Author" content="Wilson Xu">
<style type="text/css">
*{margin: 0;padding: 0;font-family: "Microsoft yahei";}
a{text-decoration: none;}
a img{display: block;border: none;}
li{list-style: none;}
.container{
width: 1200px;
padding: 20px;
margin: 10px auto;
border: 1px dashed #ccc;
}
.container h4{padding-bottom: 5px;}
.container ul{
width: 1200px;
overflow: hidden;
}
.container ul li{
float: left;
width: 331px;
padding: 20px;
height: 240px;
margin-right: 10px;
border: 10px solid rgba(10,10,10,.3);
background: url('images/1.jpg') no-repeat;
background-size: 371px auto;
}
.container ul li:last-child{margin-right: 0;}
.container ul.origin li:nth-child(1){
background-origin: border-box;
}
.container ul.origin li:nth-child(2){
background-origin: padding-box;
}
.container ul.origin li:nth-child(3){
background-origin: content-box;
}
.container ul.clip li:nth-child(1){
background-clip: border-box;
}
.container ul.clip li:nth-child(2){
background-clip: padding-box;
}
.container ul.clip li:nth-child(3){
background-clip: content-box;
}
section .pic{
width: 600px;
height: 400px;
margin: 20px auto;
border: 1px dashed #ddd;
background: url('images/3.jpg') no-repeat center center/auto 200px, url('images/2.jpg') no-repeat center center/auto 300px, url('images/1.jpg') no-repeat center center/auto 400px;
}
section p{
font-size: 14px;
color: #f01010;
}
</style>
</head>
<body>
<p class="container">
<section>
<h4>1、background-origin: border-box | padding-box | content-box</h4>
<ul class="origin">
<li></li>
<li></li>
<li></li>
</ul>
</section>
<section>
<h4 style="margin-top: 20px;border-top: 1px dashed #ccc;">2、background-clip: border-box | padding-box | content-box</h4>
<ul class="clip">
<li></li>
<li></li>
<li></li>
</ul>
</section>
<section>
<h4 style="margin-top: 20px;border-top: 1px dashed #ccc;">3、多背景:background: url('images/3.jpg') no-repeat center center/auto 200px, url('images/2.jpg') no-repeat center center/auto 300px, url('images/1.jpg') no-repeat center center/auto 400px;
</h4>
<p class="pic"></p>
<p>注释：复合写background-size的时候，一定要用/与其他值隔开。</p>
</section>
</p>
</body>
</html>5. Background exercise preview:
Linear gradient: linear-gradient (azimuth (left/left top/60deg), starting color | percentage 30%, ending color) ;When using, add the kernel prefix eg:-webkit-linear-gradient, IE9 does not support
Radial gradient: radial-gradient (center point position, diffusion degree, color domain | percentage); from the center Spread out in all directions, eg: -webkit-radial-gradient(50px 50px, starting color, ending color); -webkit-radial-gradient(center, starting color, ending color);
Compatible with lower versions of IE: filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff',endColorstr='#ff0000',GradientType='1'); 1 means from left to right, 0 means from top to bottom, And the color value can only be a 6-digit hash value
<!DOCTYPE HTML>
<html>
<head>
<title>your title name</title>
<meta charset="utf-8">
<meta name="Author" content="Wilson Xu">
<style type="text/css">
*{margin: 0;padding: 0;font-family: "Microsoft yahei";}
a{text-decoration: none;}
a img{display: block;border: none;}
li{list-style: none;}
.container{
width: 1200px;
padding: 20px;
margin: 20px auto;
border: 1px dashed #ccc;
}
.container h4{padding-bottom: 5px;}
.container ul{
width: 1200px;
overflow: hidden;
}
.container ul.linear li,
.container ul.filter li{
width: 600px;
height: 40px;
margin: 10px 0;
}
.container ul.linear li:first-child{
background: -webkit-linear-gradient(60deg,#fff 10%, #f00 30%, #0f0 50%, #00f 70%, #000);
}
.container ul.linear li:last-child{
background: -webkit-linear-gradient(left top, rgba(122,156,233,.6) 30%, rgb(255,12,222) 60%, green 80%, #fff);
}
.container ul.filter li:first-child{
background: filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#abcdef',endColorstr='#f44add',GradientType='0');
}
.container ul.filter li:last-child{
background: filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffffff',endColorstr='#000000',GradientType='1');
}
.container ul.radial li{
width: 200px;
height: 200px;
margin-right: 20px;
float: left;
border-radius: 100%;
}
.container ul.radial li:nth-child(1){
background: -webkit-radial-gradient(center, #fff, #000);
}
.container ul.radial li:nth-child(2){
background: -webkit-radial-gradient(left 50px, #fff, #000);
}
.container ul.radial li:nth-child(3){
background: -webkit-radial-gradient(50px 100px,100px 100px, #fff 80%, #000);
}
.container ul.radial li:nth-child(4){
background: -webkit-radial-gradient(left, #fff 20%, #f00 40%, #0f0 60%, #00f 80%, #000);
}
</style>
</head>
<body>
<p class="container">
<section>
<h4>1、线性渐变：-webkit-linear-gradient(方位,颜色域 | 范围百分比)</h4>
<ul class="linear">
<li></li>
<li></li>
</ul>
</section>
<section>
<h4>2、线性渐变-兼容IE低版本：filter:progid:DXImageTransform.Microsoft.gradient(startColorstr='6位哈希值',endColorstr='6位哈希值',GradientType='1／0');</h4>
<ul class="filter">
<li></li>
<li></li>
</ul>
</section>
<section>
<h4>3、径向渐变：radial-gradient(中心点位置,扩散程度，颜色域 | 百分比);</h4>
<ul class="radial">
<li></li>
<li></li>
<li></li>
<li></li>
</ul>
</section>
</p>
</body>
</html>8. Gradient preview:
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