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HTML のベスト プラクティス_html/css_WEB-ITnose

WBOY
WBOYオリジナル
2016-06-21 08:59:511162ブラウズ

HTML

DOCTYPE 头部开始

Bad:

<html>  ...</html>

Good:

<!DOCTYPE html><html>  ...</html>

不要用旧的 DOCTYPE

Bad:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"  "http://www.w3.org/TR/html4/strict.dtd">

Good:

<!DOCTYPE html>

不要用 XML 声明

Bad:

<!DOCTYPE html>

Good:

<!DOCTYPE html>

最好不要用字符引用

Bad:

<p><small>Copyright &copy; 2014 W3C<sup>&reg;</sup></small></p>

Good:

<p><small>Copyright &copy; 2014 W3C<sup>&reg;</sup></small></p>
    ###Escape &, <, >, ", and ' 可以用字符引用

Bad:

<h1>The "&" character</h1>

Good:

<h1>The &quot;&amp;&quot; character</h1>

Use named character references for control or invisible characters

Bad:

<p>This book can read in 1 hour.</p>

Good:

<p>This book can read in 1 hour.</p>

注释的内容两边留个空格

Bad:

<!--This section is non-normative-->

Good:

<!-- This section is non-normative -->

不要忽略闭合标签

Bad:

<html>  <body>    ...

Good:

<html>  <body>    ...

不要搞混空元素的格式

Bad:

<img alt="HTML Best Practices" src="/img/logo.png"><hr />

Good:

<img alt="HTML Best Practices" src="/img/logo.png"><hr>

在标签里面和属性值里不要留空格

Bad:

<h1 class=" title " >HTML Best Practices</h1>

Good:

<h1 class="title">HTML Best Practices</h1>

不要搞混大小写

Bad:

<a HREF="#general">General</A>

Good:

<a HREF="#general">General</A>

不要混用引号标记

Bad:

<img alt="HTML Best Practices" src='/img/logo.jpg'>

Good:

<img alt="HTML Best Practices" src="/img/logo.jpg">

Don't separate attributes with two or more white spaces

属性之间不要用两个空格隔开

Bad:

<input   name="q"  type="search">

Good:

<input name="q" type="search">

省略布尔属性的值

Bad:

<audio autoplay="autoplay" src="/audio/theme.mp3">

Good:

<audio autoplay src="/audio/theme.mp3">

省略命名空间

Bad:

<svg xmlns="http://www.w3.org/2000/svg" version="1.1">  ...</svg>

Good:

<svg version="1.1">  ...</svg>

不要用 xml 属性

Bad:

<span lang="ja" xml:lang="ja">...</span>

Good:

<span lang="ja">...</span>

不要搞混 data-*,Microdata，RDFa Lite 属性和通用的属性

Bad:

<img alt="HTML Best Practices" data-height="31" data-width="88" itemprop="image" src="/img/logo.png">

Good:

<img alt="HTML Best Practices" src="/img/logo.png" data-width="88" data-height="31" itemprop="image">

更强的原生语义

Bad:

<nav role="navigation">  ...</nav><hr role="separator">

Good:

<nav>  ...</nav><hr>

根元素

添加语言属性

Bad:

<html>

Good:

<html lang="en-US">

保持语言属性值尽可能的短

Bad

<html lang="ja-JP">

Good:

<html lang="ja">

文档的元数据

添加 title 元素

Bad:

<head>  <meta charset="UTF-8"></head>

Good:

<head>  <meta charset="UTF-8">  <title>HTML Best Practices</title></head>

指定微链接资源的 MIME 类型

Bad:

<link href="/pdf" rel="alternate"><link href="/feed" rel="alternate"><link href="/css/screen.css" rel="stylesheet">

Good:

<link href="/pdf" rel="alternate" type="application/pdf"><link href="/feed" rel="alternate" type="application/rss+xml"><link href="/css/screen.css" rel="stylesheet">

不要链接到 favicon.ico

Bad:

<link href="/favicon.ico" rel="icon" type="image/vnd.microsoft.icon">

Good:

把 favicon.ico 放在根目录

添加 title 属性到 备用样式表

Bad:

<link href="/css/screen.css" rel="stylesheet"><link href="/css/high-contrast.css" rel="alternate stylesheet">

Good:

<link href="/css/screen.css" rel="stylesheet"><link href="/css/high-contrast.css" rel="alternate stylesheet" title="High contrast">

给文档指定字符编码

Bad:

<head>  <title>HTML Best Practices</title></head>

Good:

<head>  <meta charset="UTF-8">  <title>HTML Best Practices</title></head>

不要用旧的字符编码格式

Bad:

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

Good:

<meta charset="UTF-8">

首先就要指定字符编码

Bad:

    <meta charset="UTF-8">  ...

Good:

  <meta charset="UTF-8">    ...

使用 utf-8 格式

Bad:

<meta charset="Shift_JIS">

Good:

<meta charset="UTF-8">

css 的 type 属性不用写

Bad:

<style type="text/css">  ...</style>

Good:

<style>  ...</style>

不要注释 style 元素的内容

Bad:

<style><!--  ...  --></style>

Good:

<style>  ...</style>

不要搞混 css 和 js 标签

Bad:

<script src="/js/jquery.min.js"></script><link href="/css/screen.css" rel="stylesheet"><script src="/js/main.js"></script>

Good:

<link href="/css/screen.css" rel="stylesheet"><script src="/js/jquery.min.js"></script><script src="/js/main.js"></script>

Also good:

<script src="/js/jquery.min.js"></script><script src="/js/main.js"></script><link href="/css/screen.css" rel="stylesheet">

添加 body 标签

Bad:

<html>      ...    ...

Good:

<html>      ...        ...

忘了 hgroup 元素吧

Bad:

<hgroup>  <h1>HTML Best Practices</h1>  <h2>For writing maintainable and scalable HTML documents.</h2></hgroup>

Good:

<h1>HTML Best Practices</h1><p>For writing maintainable and scalable HTML documents.</p>

仅仅当在联系信息的时候用 address 元素

Bad:

<address>No rights reserved.</address>

Good:

<address>Contact: <a href="https://twitter.com/hail2u_">Kyo Nagashima</a></address>

pre 元素不要在新的一行开始写

Bad:

<pre class="brush:php;toolbar:false">&lt;!DOCTYPE html&gt;

Good:

<pre class="brush:php;toolbar:false">&lt;!DOCTYPE html&gt;

在引号元素里面使用 appropriate 元素

Bad:

<blockquote>For writing maintainable and scalable HTML documents.</blockquote>

Good:

<blockquote>  <p>For writing maintainable and scalable HTML documents.</p></blockquote>

不要直接包含属性在 blockquote 元素里

Bad:

<blockquote>  <p>For writing maintainable and scalable HTML documents.</p>  <p>— HTML Best Practices</p></blockquote>

Good:

<blockquote>  <p>For writing maintainable and scalable HTML documents.</p></blockquote>
— HTML Best Practices

Also good (recommended by WHATWG):

<figure>  <blockquote>    <p>For writing maintainable and scalable HTML documents.</p>  </blockquote>  <figcaption>— HTML Best Practices</figcaption></figure>

Also good too (recommended by W3C):

<blockquote>  <p>For writing maintainable and scalable HTML documents.</p>  <footer>— HTML Best Practices</footer></blockquote>

每行只写一个列表项目

Bad:

<ul>  <li>General</li><li>The root Element</li><li>Sections</li>...</ul>

Good:

<ul>  <li>General</li>  <li>The root Element</li>  <li>Sections</li>  ...</ul>

给 ol 元素用上 type 属性

Bad:

<head>  <style>    .toc {      list-style-type: upper-roman;    }  </style></head><body>  <ol class="toc">    <li>General</li>    <li>The root Element</li>    <li>Sections</li>    ...  </ol></body>

Good:

<body>  <ol type="I">    <li>General</li>    <li>The root Element</li>    <li>Sections</li>    ...  </ol></body>

把 figcaption 元素放在 figure 元素里的开头或结尾

Bad:

<figure>  <img alt="Front cover of the “HTML Best Practices” book" src="/img/front-cover.png">  <figcaption>“HTML Best Practices” Cover Art</figcaption>  <img alt="Back cover of the “HTML Best Practices” book" src="/img/back-cover.png"></figure>

Good:

<figure>  <img alt="Front cover of the “HTML Best Practices” book" src="/img/front-cover.png">  <img alt="Back cover of the “HTML Best Practices” book" src="/img/back-cover.png">  <figcaption>“HTML Best Practices” Cover Art</figcaption></figure>

使用 main 元素

Bad:

<div id="content">  ...</div>

Good:

<main>  ...</main>

尽量的避免使用 div 标签

Bad:

<div class="chapter">  ...</div>

Good:

<section>  ...</section>Text-level semantics

不要把相同的链接分开来，可以用一个来包围

Bad:

<h1><a href="https://whatwg.org/">WHATWG</a></h1><p><a href="https://whatwg.org/">A community maintaining and evolving HTML since 2004.</a></p>

Good:

<a href="https://whatwg.org/">  <h1>WHATWG</h1>  <p>A community maintaining and evolving HTML since 2004.</p></a>

用下载属性下载一个资源

Bad:

<a href="/downloads/offline.zip">offline version</a>

Good:

<a download href="/downloads/offline.zip">offline version</a>

如果需要的话就使用 rel,hreflang 等类型属性

Bad:

<a href="/ja/pdf">Japanese PDF version</a>

Good:

<a href="/ja/pdf" hreflang="ja" rel="alternate" type="application/pdf">Japanese PDF version</a>

清理链接的文本

Bad:

<p><a href="/pdf" rel="alternate" type="application/pdf">Click here</a> to view PDF version.</p>

Good:

<p><a href="/pdf" rel="alternate" type="application/pdf">PDF version</a> is also available.</p>

不要使用 em 元素来警告着重

Bad:

<em>Caution!</em>

Good:

<strong>Caution!</strong>

尽量避免使用 s,i,b,u 这些元素

Bad:

<i class="icon-search"></i>

Good:

<span class="icon-search" aria-hidden="true"></span>

不要在 q 元素里添加引号

Bad:

<q>“For writing maintainable and scalable HTML documents”</q>

Good:

<q>For writing maintainable and scalable HTML documents</q>

Also good:

“For writing maintainable and scalable HTML documents”

给 abbr 元素添加 title 属性

Bad:

<abbr>HBP</abbr>

Good:

<abbr title="HTML Best Practices">HBP</abbr>

ruby 标记元素要长一点

Bad:

<ruby>HTML<rt>えいちてぃーえむえる</ruby>

Good:

<ruby>HTML<rp> (</rp><rt>えいちてぃーえむえる</rt><rp>) </rp></ruby>

给 non-machine-readable 元素添加 datetime 属性

Bad:

<time>Dec 19, 2014</time>

Good:

<time datetime="2014-12-19">Dec 19, 2014</time>Specify code language with class attribute prefixed with language-

Bad:

<code>&lt;DOCTYPE html></code>

Good:

<code class="language-html">&lt;DOCTYPE html></code>

让 kbd 元素尽可能的简单

Bad:

<kbd><kbd>Ctrl</kbd>+<kbd>F5</kbd></kbd>

Good:

<kbd>Ctrl+F5</kbd>

尽可能的避免 span 元素

Bad:

HTML <span class="best">Best</span> Practices

Good:

HTML <em>Best</em> Practices

br 元素后面要换行

Bad:

<p>HTML<br>Best<br>Practices</p>

Good:

<p>HTML<br>Best<br>Practices</p>

不要滥用 br 元素标签

Bad:

<p><label>Rule name: <input name="rule-name" type="text"></label><br><label>Rule description:<br><textarea name="rule-description"></textarea></label></p>

Good:

<p><label>Rule name: <input name="rule-name" type="text"></label></p><p><label>Rule description:<br><textarea name="rule-description"></textarea></label></p>

不要在 del 和 ins 元素里插入其他标签元素

Bad:

<p>For writing maintainable and scalable HTML documents.<del> And for mental stability.</p><p>Don't trust!</p></del>

Good:

<p>For writing maintainable and scalable HTML documents.<del> And for mental stability.</del></p><del><p>Don't trust!</p></del>

嵌入内容

如果需要就给 img 元素添加 alt 属性值

Bad:

<img src="/img/logo.png">

Good:

<img alt="HTML Best Practices" src="/img/logo.png">

如果可以就把 Alt 的值空着

Bad:

<img alt="Question mark icon" src="/img/icon/help.png">

Good:

<img alt="" src="/img/icon/help.png">

如果有可能就省略 alt 标签

Bad:

<img alt="CAPTCHA" src="captcha.cgi?id=82174">

Good:

<img src="captcha.cgi?id=82174" title="CAPTCHA">

清空 iframe 元素

Bad:

<iframe src="/ads/default.html">  <p>If your browser support inline frame, ads are displayed here.</p></iframe>

Good:

<iframe src="/ads/default.html"></iframe>

map 元素内容

Bad:

<map name="toc">  <a href="#general">General</a>  <area alt="General" coords="0, 0, 40, 40" href="#General"> |  <a href="#the_root_element">The root element</a>  <area alt="The root element" coords="50, 0, 90, 40" href="#the_root_element"> |  <a href="#sections">Sections</a>  <area alt="Sections" coords="100, 0, 140, 40" href="#sections"></map>

Good:

<map name="toc">  <p>    <a href="#general">General</a>    <area alt="General" coords="0, 0, 40, 40" href="#General"> |    <a href="#the_root_element">The root element</a>    <area alt="The root element" coords="50, 0, 90, 40" href="#the_root_element"> |    <a href="#sections">Sections</a>    <area alt="Sections" coords="100, 0, 140, 40" href="#sections">  </p></map>

提供音频或视频元素后备内容

Bad:

<video>  <source src="/mov/theme.mp4" type="video/mp4">  <source src="/mov/theme.ogv" type="video/ogg">  ...</video>

Good:

<video>  <source src="/mov/theme.mp4" type="video/mp4">  <source src="/mov/theme.ogv" type="video/ogg">  ...  <iframe src="//www.youtube.com/embed/..." allowfullscreen></iframe></video>

表格数据

每行写一个 td

Bad:

<tr>  <td>General</td><td>The root Element</td><td>Sections</td></tr>

Good:

<tr>  <td>General</td>  <td>The root Element</td>  <td>Sections</td></tr>

给表格使用表头 header

Bad:

<table>  <thead>    <tr>      <td><strong>Element</strong></td>      <td><strong>Empty</strong></td>      <td><strong>Tag omission</strong></td>    </tr>  </thead>  <tbody>    <tr>      <td><strong><code>pre</code></strong></td>      <td>No</td>      <td>Neither tag is omissible</td>    </tr>    <tr>      <td><strong><code>img</code></strong></td>      <td>Yes</td>      <td>No end tag</td>    </tr>  </tbody></table>

Good:

<table>  <thead>    <tr>      <th>Element</th>      <th>Empty</th>      <th>Tag omission</th>    </tr>  </thead>  <tbody>    <tr>      <th><code>pre</code></th>      <td>No</td>      <td>Neither tag is omissible</td>    </tr>    <tr>      <th><code>img</code></th>      <td>Yes</td>      <td>No end tag</td>    </tr>  </tbody></table>

表单

用 label 元素包裹表单

Bad:

<p>Query: <input name="q" type="text"></p>

Good:

<p><label>Query: <input name="q" type="text"></label></p>

尽可能的省略属性

Bad:

<label for="q">Query: <input id="q" name="q" type="text"></label>

Good:

<label>Query: <input name="q" type="text"></label>

使用合适的类型属性的input元素

Bad:

<label>Search keyword: <input name="q" type="text"></label>

Good:

当输入框是提交属性时要添加 value 值

Bad:

<input type="submit">

Good:

<input type="submit" value="Search">

当 input 元素有验证属性时，给他添加标题属性

Bad:

<input name="security-code" pattern="[0-9]{3}" type="text">

Good:

<input name="security-code" pattern="[0-9]{3}" title="A security code is a number in three figures." type="text">

不要使用占位符属性标签

Bad:

<input name="email" placeholder="Email" type="text">

Good:

<label>Email: <input name="email" placeholder="john.doe@example.com" type="text"></label>

每个 option 元素一行

Bad:

<datalist id="toc">  <option label="General"><option label="The root element"><option label="Sections"></datalist>

Good:

<datalist id="toc">  <option label="General">  <option label="The root element">  <option label="Sections"></datalist>

给进度条 元素添加最大的属性值

Bad:

<progress value="0.5"> 50%</progress>

Good:

<progress max="100" value="50"> 50%</progress>

给计数元素添加最小和最大值

Bad:

<meter value="0.5"> 512GB used (1024GB total)</meter>

Good:

<meter min="0" max="1024" value="512"> 512GB used (1024GB total)</meter>

把 legend 元素作为 fieldest 元素的第一个元素

Bad:

<fieldset>  <p><label>Is this section is useful?: <input name="usefulness-general" type="checkbox"></label></p>  ...  <legend>About "General"</legend></fieldset>

Good:

<fieldset>  <legend>About "General"</legend>  <p><label>Is this section is useful?: <input name="usefulness-general" type="checkbox"></label></p>  ...</fieldset>

Scripting

省略 js 的类型属性

Bad:

<script type="text/javascript">  ...</script>

Good:

<script>  ...</script>

如果 script 元素有异步属性，需要给 script 标签添加异不属性

Bad:

<script async src="/js/main.js"></script>

Good:

<script async defer src="/js/main.js"></script>

不要注释 script 标签里的元素

Bad:

<script>/*<![CDATA[*/  .../*]]>*/</script>

Also bad:

<script><!--  ...// --></script>

Good:

<script>  ...</script>

不要动态插入 script 元素标签

Bad:

<script>  var script = document.createElement('script');  script.async = true;  script.src = "//example.com/widget.js";  document.getElementsByTagName('head')[0].appendChild(script);</script>

Good:

<script async defer src="//example.com/widget.js"></script>

缩进始终保持一致

Bad:

<html>          ...          ...

Good:

<html>      ...        ...

原文出处：https://github.com/dyygtfx/html-best-practices

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