Some explanations about front-end page layout-HTML Tutorial-php.cn

Some explanations about front-end page layout

巴扎黑

Release： 2017-07-19 16:43:26

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The structure and performance principles of web pages are generally as follows:

First write the code according to the structure and semantics
Then perform CSS styling Settings
Reduce the fit between HTML and CSS (simplify the page structure)

We can use a case of making a list of Weibo user speech information Analyze this principle. The following is the overall implementation effect of this case:

From a beginner’s perspective:

Beginners often divide this structure into multiple DIVs, which basically look like the following blocks:

Implementation code:

 1 <!DOCTYPE html> 2 <html lang="zh-cn"> 3 <head> 4     <meta http-equiv="content-type" content="text/html; charset=utf-8"> 5     <title>test</title> 6     <style> 7     *{margin:0; padding:0;} 8     img{width: 80px; height: auto;} 9     span{color: #ccc;float: right;font-size: 12px;}10     p{overflow: hidden;}11 12     #demo1 .left{float: left; width: 160px; text-align: center;}13     #demo1 .right{width: 440px; padding: 20px; margin-left: 160px;background-color: #dafffb; border: 1px solid #ccc;}14     </style>15 </head>16 <body>17     <div id="demo1">18         <div class="left">19             <img src="http://v1.qzone.cc/avatar/201311/12/02/54/528127ffc047e093.jpg%21200x200.jpg" alt="头像">20         </div>21         <div class="right">22             <span>10分钟之前</span>23             <h6>歪嘴的肖恩</h6>24             <p>老师一直强调的是代码的简洁，减少代码的冗余，理论上确实应该如此，但是过于简洁的代码有可能对后期的优化维护造成一定难度，这是一个相互矛盾的方向，我觉得重要的是宝把握好这个度</p>25         </div>26     </div>27 </body>28 </html>

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From the perspective of the intermediate front-end:

The DIV where the picture on the left is located can be omitted, and it becomes like this:

Implementation code:

 1 <!DOCTYPE html> 2 <html lang="zh-cn"> 3 <head> 4     <meta http-equiv="content-type" content="text/html; charset=utf-8"> 5     <title>test</title> 6     <style> 7     *{margin:0; padding:0;} 8     img{width: 80px; height: auto;} 9     span{color: #ccc;float: right;font-size: 12px;}10     p{overflow: hidden;}11 12     #demo2 img{float: left;margin-left: 40px;}13     #demo2 .right{width: 440px; padding: 20px; margin-left: 160px;background-color: #dafffb; border: 1px solid #ccc;}14     </style>15 </head>16 <body>17     <div id="demo2">18         <img src="http://v1.qzone.cc/avatar/201311/12/02/54/528127ffc047e093.jpg%21200x200.jpg" alt="头像">19         <div class="right">20             <span>10分钟之前</span>21             <h6>歪嘴的肖恩</h6>22             <p>老师一直强调的是代码的简洁，减少代码的冗余，理论上确实应该如此，但是过于简洁的代码有可能对后期的优化维护造成一定难度，这是一个相互矛盾的方向，我觉得重要的是宝把握好这个度</p>23         </div>24     </div>25 </body>26 </html>

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From an advanced front-end perspective:

All elements are placed in a DIV. The structure is simpler, just move the picture out:

Implementation code:

 1 <!DOCTYPE html> 2 <html lang="zh-cn"> 3 <head> 4     <meta http-equiv="content-type" content="text/html; charset=utf-8"> 5     <title>test</title> 6     <style> 7     *{margin:0; padding:0;} 8     img{width: 80px; height: auto;} 9     span{color: #ccc;float: right;font-size: 12px;}10     p{overflow: hidden;}11 12     #demo3{width: 440px; padding: 20px; margin-left: 160px;background-color: #dafffb; border: 1px solid #ccc;}13     #demo3 img{float: left;margin: -20px 0 0 -140px;}14     </style>15 </head>16 <body>17     <div id="demo3">18         <img src="http://v1.qzone.cc/avatar/201311/12/02/54/528127ffc047e093.jpg%21200x200.jpg" alt="头像">19         <span>10分钟之前</span>20         <h6>歪嘴的肖恩</h6>21         <p>老师一直强调的是代码的简洁，减少代码的冗余，理论上确实应该如此，但是过于简洁的代码有可能对后期的优化维护造成一定难度，这是一个相互矛盾的方向，我觉得重要的是宝把握好这个度</p>22     </div>23 </body>24 </html>

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