Beginning HTML5 and CSS3 读后感1

Beginning HTML5 and CSS3javascript

正儿八经想作点网站,哪怕是不成体系的,至少在作iOS /Android作两个后台返回测试得能作吧,部署明后年的跳槽计划,得一步步来,急不得。css

我一项认为,iOS/Android都属于前台的范畴,和网页前台没多少差别,只是基于平台,要比兼容各类浏览器的版本简单些而已,额外扩展一些平台关联性。如今跨平台开发也渐渐兴盛,主要是如今HTML5/css/javascript能让显示效果各类酷炫。加之iOS7的JavaScriptCore.framework,Android的V8/JavaScriptCore, 对JavaScript的支持都是各类好,因此我认为,跨平台方案在以后的简单商业应用中可行性却是有的,听说,咱们公司在今年会部署两个跨平台项目。因此html5这一套东西,如今得开始好好学习练习。html

写到这里,我想到了cocos2dx-javascript,这个应该是引擎绑定的,具体的引擎就须要去参考源码了。html5

废话很少说,仍是来看看这两天HTML5看了些什么玩意。java

HTML5核心就是增长了语义,semantic这个词常常出现,有个例子我记忆深入,<small>表达的意思,是it’s a small print. 不是display in a small size.这就是语义和描述的区别,我认为也是HTML5 和 css的区别。ajax

基于语义,咱们也就知道为何HTML5为何会定义<section>,<nav>,<article>等等,其实这些用<div>就能够所有搞定。就好像我大学时候那时候用table,<frame>来划分空间弱爆了,好了,如今HTML5用单词来表示大概的语义,具体的布局就放给了css,好吧,我影响那时候都没听过css/javascript,那时候ajax仍是很高级的,看了本书,感受云里雾里的。浏览器

简单的描述一些书中涉及到的tag:app

Structural building blocks:<div>,<section>, and <article>ide

<div>: It’s a flow content with no additional semantic meaning.svn

<section>: a generic document or application section. it’s a chunk of related contents.

<article>: An independent section of a document or site.


how to decide which to use:

1. Would the enclosed content make sense on its own in a feed reader? If so, use <article>. 

2. Is the enclosed content related? If so, use <section>.

3. If there’s no semantic relationship, use <div>.

Headings: <header>, <hgroup>, and <h1>-<h6>, plus <footer>

<header>: used for introductory and navigational content of a sectioning element.

<footer>: used for additional information about the content.

<hgroup>: A specialized form of <header> the can contain only <h1>-<h6> elements.

<h1>-<h6>: 


<nav>: A section of navigational links,either to other pages (generally site navigation) or sections on the same page (such as a table of contents for long article).

<aside>: A section of a page that consists of content that is tangentially related to —but separate from — the surrounding content.

<figure>: For content that is essential to understanding but can be removed from the document’s flow (moved to a different place) without affecting the document’s meaning.

Choose between <aside> or <figure> by asking yourself if the content is essential to the section’s understanding. If the content is just related and not essential, use <aside>. If the content is essential but its position in the flow of content isn’t important (could it be moved to an appendix?), use <figure>. 

一个例子:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>Article (HTML5)</title>
</head>
<body>
<header id="branding"><!-- page header (not in section etc) -->
   
<h1>Site name</h1>
    <!-- other page heading content -->
</header>
<nav>
    <ul><li>Main navigation</li></ul>
</nav>
<div id="content"> <!-- wrapper for CSS styling and no title so not section -->
   
<article> <!-- main content (the article) -->
       
<header>
            <h1>Article title</h1>
            <p>Article metadata</p>
        </header>
        <p>Article content...</p>
        <footer>Article footer</footer>
    </article>
    <aside id="sidebar"> <!-- secondary content for page (not related to article) -->
       
<h3>Sidebar title</h3> <!-- ref: HTML5-style heading element levels -->
       
<p>Sidebar content</p>
    </aside>
</div>
<footer id="footer">Footer</footer> <!-- page footer -->
</body>
</html>

主体内容基本如是,其余必须提到的一些内容以下:

HTML5 validator: https://validator.whatwg.org/ 

HTML5 Lint:网页打不开,仍是从新搜一个吧。

这两个均可以让你的HTML5 网页更符合规范,借助工具,提升规范性。

3.  HTML5 polyfills: 

 相似以下的语法:

 <!--[if lt IE 9]>

<script type="text/javascript" src="http://html5shiv.googlecode.com/svn/trunk/html5.js"></script> 

<![endif]-->

你能够在博客在线中看到相似的语法,用于兼容IE老版本,我忽然想起Bsie这个库,^_^.

4.  outlining algorithm:https://gsnedders.html5.org/outliner/

这个比较高大上了,能够看到你整个文档的结构,固然得是设计好的,随意输入一个URL,你能够看到有的页面设计的并非那么好。虽然看起来不错。

至于兼容性的写法,我我的就不是很关注了,我相信,IE6这种玩意是应该被摒弃的,咱们也应该全面进入HTML5时代,老的就无论了。

这个基本是前三章的内容了,我也就记得这么多了,读读英文书,总感受焕然一心,难道是心理做用。

最后还得推荐一个网址:https://html.spec.whatwg.org/

相关文章
相关标签/搜索