blocks|key|1964610|text|media="all"++++//+Used+for+all+media+type+devices+(+its+default+under+html+5)
media="screen"+//+Used+for+computer+screens(default+value++for+html+4.01)|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1964611|好读|unstyled|offset|length|style|BOLD|1964612|7.3+Recognized+media+types|1964613|Is+there+no+difference+between+No+media+and+media=“all”+in+css+link?|1964614|entityMap|0|LINK|mutability|MUTABLE|url|http://www.w3.org/TR/CSS2/media.html|1|https://stackoverflow.com/questions/6921573/is-there-no-difference-between-no-media-and-media-all-in-css-link^0|0|0|2|0|0|Q|0|0|0|1W|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|Z|8|@$G|10|H|11|I|J]]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@]|9|@$G|13|H|14|1|15]]|A|$]]|$1|M|3|N|5|F|7|16|8|@]|9|@$G|17|H|18|1|19]]|A|$]]|$1|O|3|-4|5|F|7|1A|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]]]

<pre><code>media="all" // Used for all media type devices ( its default under html 5)
media="screen" // Used for computer screens(default value for html 4.01)
</code></pre>

Good read

<a href="http://www.w3.org/TR/CSS2/media.html" rel="noreferrer">7.3 Recognized media types</a> 
<a href="https://stackoverflow.com/questions/6921573/is-there-no-difference-between-no-media-and-media-all-in-css-link">Is there no difference between No media and media=“all” in css link?</a>

blocks|key|475287|text|根据W3C+Spec的说法|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|475288|7.3可识别的媒体类型|475289|475290|为CSS媒体类型选择的名称反映了相关属性有意义的目标设备。在下面的CSS媒体类型列表中，媒体类型的名称是标准的，但描述是信息性的。同样，每个属性的描述中的"Media“字段也是信息性的。|blockquote|475291|475292|475293|所有|style|BOLD|475294|适用于所有设备的|475295|。|475296|475297|475298|盲文|475299|用于盲文触觉反馈设备的|475300|475301|475302|475303|浮雕|475304|用于分页盲文打印机的|475305|475306|475307|475308|手持式|475309|用于手持设备(通常是小屏幕，有限带宽)的|475310|475311|475312|475313|打印|475314|用于分页材料和在打印预览模式下在屏幕上查看的文档的|475315|。有关特定于分页介质的格式化问题的信息，请参阅分页介质部分。|475316|475317|475318|投影|475319|475320|适用于投影演示文稿，例如投影仪。有关特定于分页介质的格式化问题的信息，请参阅分页介质部分。|475321|475322|475323|屏幕|475324|主要用于彩色计算机屏幕的|475325|475326|475327|475328|speech|475329|用于语音合成器的|475330|。注意:+CSS2有一种类似的媒体类型，称为“音频”，用于此目的。有关详细信息，请参阅音频样式表中的附录。|475331|475332|475333|tty|475334|475335|适用于使用固定间距字符网格的媒体(如电传打字机、终端或显示功能有限的便携设备)。作者不应该在"tty“媒体类型中使用像素单位。|475336|475337|475338|tv|475339|适用于电视机类型设备的|475340|+(低分辨率、彩色、有限滚动屏幕、可播放声音)。|475341|475342|entityMap|0|LINK|mutability|MUTABLE|url|https://www.w3.org/TR/CSS2/media.html^0|2|8|0|0|0|0|0|0|0|0|2|0|0|0|0|0|0|2|0|0|0|0|0|0|2|0|0|0|0|0|0|3|0|0|0|0|0|0|2|0|0|0|0|0|0|2|0|0|0|0|0|0|2|0|0|0|0|0|0|6|0|0|0|0|0|0|3|0|0|0|0|0|0|2|0|0|0|0^^$0|@$1|2|3|4|5|6|7|2W|8|@]|9|@$A|2X|B|2Y|1|2Z]]|C|$]]|$1|D|3|E|5|6|7|30|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|31|8|@]|9|@]|C|$]]|$1|G|3|H|5|I|7|32|8|@]|9|@]|C|$]]|$1|J|3|-4|5|6|7|33|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|34|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|35|8|@$A|36|B|37|N|O]]|9|@]|C|$]]|$1|P|3|Q|5|6|7|38|8|@]|9|@]|C|$]]|$1|R|3|S|5|I|7|39|8|@]|9|@]|C|$]]|$1|T|3|-4|5|6|7|3A|8|@]|9|@]|C|$]]|$1|U|3|-4|5|6|7|3B|8|@]|9|@]|C|$]]|$1|V|3|W|5|6|7|3C|8|@$A|3D|B|3E|N|O]]|9|@]|C|$]]|$1|X|3|Y|5|6|7|3F|8|@]|9|@]|C|$]]|$1|Z|3|S|5|I|7|3G|8|@]|9|@]|C|$]]|$1|10|3|-4|5|6|7|3H|8|@]|9|@]|C|$]]|$1|11|3|-4|5|6|7|3I|8|@]|9|@]|C|$]]|$1|12|3|13|5|6|7|3J|8|@$A|3K|B|3L|N|O]]|9|@]|C|$]]|$1|14|3|15|5|6|7|3M|8|@]|9|@]|C|$]]|$1|16|3|S|5|I|7|3N|8|@]|9|@]|C|$]]|$1|17|3|-4|5|6|7|3O|8|@]|9|@]|C|$]]|$1|18|3|-4|5|6|7|3P|8|@]|9|@]|C|$]]|$1|19|3|1A|5|6|7|3Q|8|@$A|3R|B|3S|N|O]]|9|@]|C|$]]|$1|1B|3|1C|5|6|7|3T|8|@]|9|@]|C|$]]|$1|1D|3|S|5|I|7|3U|8|@]|9|@]|C|$]]|$1|1E|3|-4|5|6|7|3V|8|@]|9|@]|C|$]]|$1|1F|3|-4|5|6|7|3W|8|@]|9|@]|C|$]]|$1|1G|3|1H|5|6|7|3X|8|@$A|3Y|B|3Z|N|O]]|9|@]|C|$]]|$1|1I|3|1J|5|6|7|40|8|@]|9|@]|C|$]]|$1|1K|3|1L|5|I|7|41|8|@]|9|@]|C|$]]|$1|1M|3|-4|5|6|7|42|8|@]|9|@]|C|$]]|$1|1N|3|-4|5|6|7|43|8|@]|9|@]|C|$]]|$1|1O|3|1P|5|6|7|44|8|@$A|45|B|46|N|O]]|9|@]|C|$]]|$1|1Q|3|-4|5|6|7|47|8|@]|9|@]|C|$]]|$1|1R|3|1S|5|I|7|48|8|@]|9|@]|C|$]]|$1|1T|3|-4|5|6|7|49|8|@]|9|@]|C|$]]|$1|1U|3|-4|5|6|7|4A|8|@]|9|@]|C|$]]|$1|1V|3|1W|5|6|7|4B|8|@$A|4C|B|4D|N|O]]|9|@]|C|$]]|$1|1X|3|1Y|5|6|7|4E|8|@]|9|@]|C|$]]|$1|1Z|3|S|5|I|7|4F|8|@]|9|@]|C|$]]|$1|20|3|-4|5|6|7|4G|8|@]|9|@]|C|$]]|$1|21|3|-4|5|6|7|4H|8|@]|9|@]|C|$]]|$1|22|3|23|5|6|7|4I|8|@$A|4J|B|4K|N|O]]|9|@]|C|$]]|$1|24|3|25|5|6|7|4L|8|@]|9|@]|C|$]]|$1|26|3|27|5|I|7|4M|8|@]|9|@]|C|$]]|$1|28|3|-4|5|6|7|4N|8|@]|9|@]|C|$]]|$1|29|3|-4|5|6|7|4O|8|@]|9|@]|C|$]]|$1|2A|3|2B|5|6|7|4P|8|@$A|4Q|B|4R|N|O]]|9|@]|C|$]]|$1|2C|3|-4|5|6|7|4S|8|@]|9|@]|C|$]]|$1|2D|3|2E|5|I|7|4T|8|@]|9|@]|C|$]]|$1|2F|3|-4|5|6|7|4U|8|@]|9|@]|C|$]]|$1|2G|3|-4|5|6|7|4V|8|@]|9|@]|C|$]]|$1|2H|3|2I|5|6|7|4W|8|@$A|4X|B|4Y|N|O]]|9|@]|C|$]]|$1|2J|3|2K|5|6|7|4Z|8|@]|9|@]|C|$]]|$1|2L|3|2M|5|I|7|50|8|@]|9|@]|C|$]]|$1|2N|3|-4|5|6|7|51|8|@]|9|@]|C|$]]|$1|2O|3|-4|5|6|7|52|8|@]|9|@]|C|$]]]|2P|$2Q|$5|2R|2S|2T|C|$2U|2V]]]]

According to <a href="https://www.w3.org/TR/CSS2/media.html" rel="nofollow noreferrer">W3C Spec</a>:

7.3 Recognized media types

<blockquote>
 The names chosen for CSS media types reflect target devices for which
 the relevant properties make sense. In the following list of CSS media
 types the names of media types are normative, but the descriptions are
 informative. Likewise, the "Media" field in the description of each
 property is informative.
</blockquote>

all

<blockquote>
 Suitable for all devices.
</blockquote>

braille

<blockquote>
 Intended for braille tactile feedback devices.
</blockquote>

embossed

<blockquote>
 Intended for paged braille printers.
</blockquote>

handheld

<blockquote>
 Intended for handheld devices (typically small screen, limited
 bandwidth).
</blockquote>

print

<blockquote>
 Intended for paged material and for documents viewed on screen in
 print preview mode. Please consult the section on paged media for
 information about formatting issues that are specific to paged media.
</blockquote>

projection

<blockquote>
 Intended for projected presentations, for example projectors. Please
 consult the section on paged media for information about formatting
 issues that are specific to paged media.
</blockquote>

screen

<blockquote>
 Intended primarily for color computer screens.
</blockquote>

speech

<blockquote>
 Intended for speech synthesizers. Note: CSS2 had a similar media type
 called 'aural' for this purpose. See the appendix on aural style
 sheets for details.
</blockquote>

tty

<blockquote>
 Intended for media using a fixed-pitch character grid (such as
 teletypes, terminals, or portable devices with limited display
 capabilities). Authors should not use pixel units with the "tty" media
 type.
</blockquote>

tv

<blockquote>
 Intended for television-type devices (low resolution, color,
 limited-scrollability screens, sound available).
</blockquote>

It seems like recently I have seen many more people starting to use <code>media="all"</code> vs <code>media="screen"</code> in their stylesheets. 

My question is when should I use <code>media="all"</code> over <code>media="screen"</code> and vice versa?

Note: I am using HTML5 Doctype if that makes a difference.

Media=All vs Media=Screen

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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似乎最近我看到越来越多的人开始在他们的样式表中使用media="all"和media="screen"。我的问题是什么时候我应该使用media="all"而不是media="screen"，反之亦然？注意:我使用的是HTML5文档类型，如果有区别的话。

问Media=All vs Media=Screen
EN

回答 2

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问Media=All vs Media=ScreenEN

回答 2

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问Media=All vs Media=Screen
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