Html <XMP> 标签是干什么用的？
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What was the <XMP> tag used for?
提问by GateKiller
Does anyone remember the XMPtag?
有谁记得这个XMP标签吗？
What was it used for and why was it deprecated?
它有什么用途，为什么被弃用？
采纳答案by graham.reeds
A quick Google search on W3C reveals that XMPwas introduced for displaying preformatted textin HTML 3.2 and earlier. When W3C deprecated the XMPtag, it suggested using the PREtag as a preferred alternative.
在 W3C 上的快速谷歌搜索显示，它XMP是为了在 HTML 3.2 及更早版本中显示预格式化文本而引入的。当 W3C 弃用该XMP标签时，它建议使用该PRE标签作为首选替代方案。
Update: http://www.w3.org/TR/REC-html32#xmp, http://www.w3.org/MarkUp/html-spec/html-spec_5.html#SEC5.5.2.1
更新：http: //www.w3.org/TR/REC-html32#xmp，http: //www.w3.org/MarkUp/html-spec/html-spec_5.html#SEC5.5.2.1
回答by dadinck
XMPand PREdiffer. Content within PREtags is formatted as follows:
XMP和PRE不同。PRE标签内的内容格式如下：
- Content is shown with a fixed font,
- All whitespace is preserved, and
- Each line break begins a new line.
- 内容以固定字体显示，
- 保留所有空白，并且
- 每个换行符开始一个新行。
If you want to include special characters such as <, >and &within PREtags, they must be escaped so that they are not subject to special interpretation by the browser.
如果要在标签中包含诸如<,>和&之类的特殊字符PRE，则必须对它们进行转义，以免浏览器对其进行特殊解释。
In contrast, content within XMPtags does notneed to be escaped.
相比之下，中的内容XMP标签就不会需要进行转义。
The only character sequence that cannot be included within XMPtags is the XMPend tag (</XMP>).
唯一不能包含在XMP标签中的字符序列是XMP结束标签 ( </XMP>)。
XMPis still supported by the browsers I have tested. You can try it with xmp.html. View the source to see the tags.
XMP我测试过的浏览器仍然支持。你可以用xmp.html 试试。查看源代码以查看标签。
回答by Thomas
XMP does some things that PRE does not support. I still depend on XMP, there is nosubstitute.
XMP 做了一些 PRE 不支持的事情。我仍然依赖 XMP，没有替代品。
回答by noobninja
<xmp>is used with strapdown.jsin formatting markdown notation. The name strapdowncombining the terms bootstrapand markdown.
<xmp>在格式化 markdown 符号中与stripdown.js一起使用。名称捷联结合了术语bootstrap和markdown。
<!DOCTYPE html>
<html>
<title>Example</title>
<xmp theme="united">
## Example
- note one
- note two
- note three
</xmp>
<script src="http://strapdownjs.com/v/0.2/strapdown.js"></script>
</html>
回答by Phil Busby
I used <textarea>, which puts the html code into a neat box and clearly defines the code as different from the text before or after.
我使用了<textarea>，它将html代码放入一个整洁的框中，并清楚地将代码定义为与之前或之后的文本不同。
<textarea><b>boldtext</b><textarea>
<textarea><b>boldtext</b><textarea>
回答by mplungjan
Still works to show raw html - if you use it in script, break the start tag.
仍然可以显示原始 html - 如果您在脚本中使用它，请打破开始标记。
var stuff='<xmp'+'>this is shown as is<br/>hello</xmp>';
document.getElementById("x").innerHTML=stuff;<div id="x"></div>回答by Alohci
See http://www.w3.org/Bugs/Public/show_bug.cgi?id=12235
见http://www.w3.org/Bugs/Public/show_bug.cgi?id=12235
For HTML5. it was, according to the HTML5 editor (comments 11 and 12), a very close call either way.
对于 HTML5。根据 HTML5 编辑器（评论 11 和 12）的说法，无论哪种方式都是非常接近的。
回答by Adam F
I still use the xmptag for debugging var_dump();in PHP. I just can't remember to use the pretag for some reason.
我仍然使用该xmp标签var_dump();在 PHP 中进行调试。我只是不记得pre出于某种原因使用了这个标签。
I think it doesn't really matter because if you really want to output text, you should use textareawith the readonlyattribute.
我认为这并不重要，因为如果你真的想输出文本，你应该使用textarea与readonly属性。
