HTML5

<!--语义化标签-->
<header>头部标签</header>
<nav>导航标签</nav>
<article>内容标签</article>
<section>块级标签</section>
<aside>侧边栏标签</aside>
<footer>尾部标签</footer>

<!--多媒体标签-->
<video>视频</video>
<audio>音频</audio>

<!--表单元素、属性-->
<input type="email" required="required"  placeholder="提示文本"  autofocus="autofocus"  autocomplete="on/off" multiple="multiple"  />
<input type="url" />
<input type="number" />
<input type="tel />
<input type="date" />
<input type="time" />
<input type="month" />
<input type="week" />
<input type="search" />