最近，想提高代码的识别度，学习了一下html5语义化标签。
HTML5 可以让很多更语义化的结构化代码标签代替大量的无意义的 div 标签。这种语义化的特性不仅提升了网页的质量和语义，并且减少了以前用于CSS 调用的class 和 id 属性。
html5常用结构标签: header,nav,body,article,section,aside,hgroup,figure,figcaption,footer
标签用于对 section 或 网页 的标题进行组合，使用 figcaption 元素为元素组添加标题。
<!doctype html><html><head><meta charset = "utf-8"><title>html5结构标签让页面布局更语义化</title><style>body,div{margin:0px;padding:0px;}.clear:after{ visibility:hidden; display:block;font-size:0; content:"."; clear:both;height:0;} * html .clear{zoom:1;clear:both;}*:first-child+html .clear{zoom:1;clear:both;} .clear{ zoom:1; clear:both;}header{border:1px solid green;margin:5px auto;width:80%;height:100px;background:#abcdef;}header nav{border:1px solid black;height:100px;line-height:100px;text-align:center;font-size:30px;color:green;}.container{border:1px solid green;width:80%;height:auto;margin:5px auto;background:#abcdef;}.container section{width:65%;border:1px solid black;height:450px;text-align:center;font-size:30px;color:green;line-height:450px;float:left;background:#abcdef;}.container aside{width:32%;border:1px solid black;height:450px;line-height:450px;text-align:center;font-size:30px;color:green;float:right;background:#abcdef;}footer{border:1px solid green;width:80%;height:100px;line-height:100px;text-align:center;font-size:30px;color:green;margin:5px auto;background:#abcdef;}</style></head><body><header><nav>header</nav></header><div class="container clear"><section>section</section><aside>aside</aside></div><footer> footer</footer></body></html>
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