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css-creating's Issues

calc() 中需要保持空格的问题

错误的语法

width: calc(100%/3-2*1em+2*1px)
margin: calc(1rem -2px) calc(1rem- 1px);

正确的语法

width: calc(100%/3 - 2*1em + 2*1px)
margin: calc(1rem - 2px) calc(1rem - 1px);

推荐的写法:

width: calc(100% / 3 - 2 * 1em + 2 * 1px)
margin: calc(1rem - 2px) calc(1rem - 1px);

「*」、「/」虽然不用加前后空格,但是为了统一,建议都加空格。

font-size: calc(100vw / 40);
background-position: calc(50% + 20px), calc(50% + 20px);

移动端CSS书写注意事项

例如:

  1. -webkit-overflow-scrolling: touch;

    用于修复overflow: scroll时不能平滑滚动的问题。

  2. [译] iOS 7 之 HTML5 综合测评:亮点、缺点和槽点

  3. Android 2.3 -webkit-border-radius 不支持 % 单位?

  4. Android Webkit中CSS属性zIndex问题

  5. PPT:淘宝移动端Web开发最佳实践

  6. devicePixelRatio = 1.5 引发的问题

  7. Android 4.2.x 和 三星 Galaxy S4 border-radius 背景色溢出

  8. Android Chrome -webkit-overflow-scrolling: touch; 问题

  9. 移动端 click 事件 300ms 延迟问题:使用fastclick解决。详见《300 毫秒点击延迟的来龙去脉》

  10. iOS 7.1 Safari 的 minimal-ui 属性有一个小 bug,第一次打开页面的时候,window.innerHeight 值不正确。http://github.hjin.me/minimal_ui_bug/

  11. http://csstriggers.com 详细记录了常见 CSS 属性的性能。

关于缩进描述

关于第一点的缩进描述,只说了不要空格和制表符混用,但没给出明确要求是用空格还是制表符,写清楚一点吧

省略嵌入式资源的协议头

省略图像、媒体文件、样式表和脚本等URL协议头部声明 ( http: , https: )。如果不是这两个声明的URL则不省略。

省略协议声明,使URL成相对地址,防止内容混淆问题和导致小文件重复下载。

<script src="http://www.xxx.com/js/*.js"></script>

<script src="//www.xxx.com/js/*.js"></script>

/* 不推荐 */

.example {
  background: url(http://www.xxx.com/images/*.png);
}

/* 推荐 */

.example {
  background: url(//www.xxx.com/images/*.png);
}

这个是google的开发指南中的一点,感觉还是很不错的,可以考虑加上

链接报错

第一、缩进与换行/ 2、 快速开始/ 3、安装编辑器插件 这里的sublime指向跟文字错了。。 sublime 不是 subtdme

避免使用 CSS-wide keywords

CSS 规范中定义了一些保留关键字,我们应该在 <custom-ident> 中避免使用这些值。历史遗留原因,虽然当前某些浏览器支持这些值,但在将来可能会禁用,这会导致相关 CSS 失效。

TODO: CSS 示例

详见:

这些关键字当前散落在不同的规范,包括:

css-values-4

https://www.w3.org/TR/css-values-4/#common-keywords

Defined:

  • initial
  • inherit
  • unset

css-cascade-4

https://drafts.csswg.org/css-cascade/#defaulting-keywords

Defined:

  • initial
  • inherit
  • unset
  • revert

css-cascade-5

https://drafts.csswg.org/css-cascade-5/#revert-layer

Defined:

  • initial
  • inherit
  • unset
  • revert
  • revert-layer

css-values-4

https://www.w3.org/TR/css-values-4/#ref-for-css-wide-keywords

The CSS-wide keywords are not valid <custom-ident>s. The default keyword is reserved and is also not a valid <custom-ident>

There is a default keyword.

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