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Detailed examples of background applications of Html5

零到壹度

Apr 08, 2018 am 10:09 AM

html5background

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(&#39;images/1.jpg&#39;) 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(&#39;images/3.jpg&#39;) no-repeat center center/auto 200px, url(&#39;images/2.jpg&#39;) no-repeat center center/auto 300px, url(&#39;images/1.jpg&#39;) no-repeat center center/auto 400px;
      }
      section p{
        font-size: 14px;
        color: #f01010;
      }
    </style>
  </head>
  <body>
    <p class="container">
      <section>
        <h4 id="background-origin-nbsp-border-box-nbsp-nbsp-padding-box-nbsp-nbsp-content-box">1、background-origin: border-box | padding-box | content-box</h4>
        <ul class="origin">
          <li></li>
          <li></li>
          <li></li>
        </ul>
      </section>
      <section>
        <h4 id="background-clip-nbsp-border-box-nbsp-nbsp-padding-box-nbsp-nbsp-content-box">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(&#39;images/3.jpg&#39;) no-repeat center center/auto 200px, url(&#39;images/2.jpg&#39;) no-repeat center center/auto 300px, url(&#39;images/1.jpg&#39;) 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:

##6. Gradient:

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

7. Gradient practice 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: 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=&#39;#abcdef&#39;,endColorstr=&#39;#f44add&#39;,GradientType=&#39;0&#39;);
      }
      .container ul.filter li:last-child{
        background: filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=&#39;#ffffff&#39;,endColorstr=&#39;#000000&#39;,GradientType=&#39;1&#39;);
      }

      .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 id="线性渐变-webkit-linear-gradient-方位-颜色域-nbsp-nbsp-范围百分比">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 id="线性渐变-兼容IE低版本-filter-progid-DXImageTransform-Microsoft-gradient-startColorstr-位哈希值-endColorstr-位哈希值-GradientType">2、线性渐变-兼容IE低版本：filter:progid:DXImageTransform.Microsoft.gradient(startColorstr=&#39;6位哈希值&#39;,endColorstr=&#39;6位哈希值&#39;,GradientType=&#39;1／0&#39;);</h4>
        <ul class="filter">
          <li></li>
          <li></li>
        </ul>
      </section>
      <section>
        <h4 id="径向渐变-radial-gradient-中心点位置-扩散程度-颜色域-nbsp-nbsp-百分比">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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