这是一级标题

这是一个用于测试的段落。

这是二级标题

这是一个用于测试的段落。

这是三级标题

这是一个用于测试的段落。

这是四级标题

这是一个用于测试的段落。

这是五级标题

这是一个用于测试的段落。

这是六级标题

这是一个用于测试的段落。

基本块元素显示测试

这是一个普通段落(
p元素)。 为了增加这个段落的长度，让我们说一说这个页面，它主要是用来测试
用户样式表的现实效果。 当然，你也可以用它来实现其它各种用途，比如，测试一下各种HTML元素在不同的浏览器里缺省的显示效果。你也可以用它来测试将HTML转换成其它格式，可以用这个页面看出是否有些元素是否转换错了。

这是另外一个段落。This is another paragraph. I think it needs to be added that the set of elements tested is not exhaustive in any
sense. I have selected those elements for which it can make sense to write user style sheet rules, in my opionion.

This is a block quotation containing a single paragraph. Well, not quite, since this is not
really
quoted text, but I hope you understand the point. After all, this page does not use HTML markup very normally anyway.

The following contains address information about the author, in an
address element.

Lists

This is a paragraph before an
unnumbered list (
ul). Note that the spacing between a paragraph and a list before or after that is hard to tune in a user style sheet. You
can't guess which paragraphs are logically related to a list, e.g. as a "list header".

• One.
• Two.
• Three. Well, probably this list item should be longer. Note that for short items lists look better if they are compactly
  presented, whereas for long items, it would be better to have more vertical spacing between items.
• Four. This is the last item in this list. Let us terminate the list now without making any more fuss about it.

The following is a
menu list:

The following is a
dir list:

• One.
• Two.
• Three. Well, probably this list item should be longer so that it will probably wrap to the next line in rendering.

This is a paragraph before a
numbered list (
ol). Note that the spacing between a paragraph and a list before or after that is hard to tune in a user style sheet. You
can't guess which paragraphs are logically related to a list, e.g. as a "list header".

1. One.
2. Two.
3. Three. Well, probably this list item should be longer. Note that if items are short, lists look better if they are compactly
   presented, whereas for long items, it would be better to have more vertical spacing between items.
4. Four. This is the last item in this list. Let us terminate the list now without making any more fuss about it.

This is a paragraph before a
definition list (
dl). In principle, such a list should consist of
terms and associated definitions. But many authors use
dl elements for fancy "layout" things. Usually the effect is not
too bad, if you design user style sheet rules for
dl which are suitable for real definition lists.

recursion

see recursion

recursion, indirect

see indirect recursion

indirect recursion

see recursion, indirect

term

a word or other expression taken into specific use in a well-defined meaning, which is often defined rather rigorously,
even formally, and may differ quite a lot from an everyday meaning

Text-level markup, in alphabetical order

• CSS (an abbreviation;
  abbr markup used)
• radar (an acronym;
  acronym markup used)
• bolded (
  b markup used - just bolding with unspecified semantics)
• Origin of Species (a book title;
  cite markup used)
• a[i] = b[i] + c[i); (computer code;
  code markup used)
• here we have some
  deleted text (
  del markup used)
• an
  octet is an entity consisting of eight bits (
  dfn markup used for the term being defined)
• this is
  very simple (
  em markup used for emphasizing a word)
• Homo sapiens (should appear in italics;
  i markup used)
• here we have some
  inserted text (
  ins markup used)
• type
  yes when prompted for an answer (
  kbd markup used for text indicating keyboard input)
• Hello! (
  q markup used for quotation)
• He said:
  She said
  Hello!
  (a quotation inside a quotation)
• you may get the message
  Core dumped at times (
  samp markup used for sample output)
• this is not that important (
  small markup used)
• overstruck (
  strike markup used; note:
  s is a nonstandard synonym for
  strike)
• this is highlighted text (
  strong markup used)
• In order to test how subscripts and superscripts (
  sub and
  sup markup) work inside running text, we need some dummy text around constructs like x
  ₁ and H
  ₂O (where subscripts occur). So here is some fill so that you will (hopefully) see whether and how badly the
  subscripts and superscripts mess up vertical spacing between lines. Now superscripts: M
  ^lle, 1
  ^st, and then some mathematical notations: e
  ^x, sin
  ²
  x, and some nested superscripts (exponents) too: e
  ^{x
  2}
  and f(x)
  ^{g(x)
  a+b+c}
  
  (where 2 and a+b+c should appear as exponents of exponents).
• underlined text (
  u markup used)
• the command
  cat
  filename displays the file specified by the
  filename (
  var markup used to indicate a word as a variable).

Some of the elements tested above are typically displayed in a monospace font, often using the
same presentation for all of them. This tests whether that is the case on your browser:

• This is sample text inside code markup
• This is sample text inside kbd markup
• This is sample text inside samp markup

Links

• main page
• Unicode Standard, chapter 6

This is a text paragraph that contains some inline links. Generally, inline links (as opposite to e.g. links lists) are problematic
from the
usability perspective, but they may have use as “incidental”, less relevant links. See the document

Links Want To Be Links
.

Forms

Pre

function $initHighlight(block, cls) {
  try {
    if (cls.search(/\bno\-highlight\b/) != -1)
      return process(block, true, 0x0F) +
             ` class="${cls}"`;
  } catch (e) {
    /* handle exception */
  }
  for (var i = 0 / 2; i < classes.length; i++) {
    if (checkCondition(classes[i]) === undefined)
      console.log('undefined');
  }
}

export  $initHighlight;

@font-face {
  font-family: Chunkfive; src: url('Chunkfive.otf');
}

body, .usertext {
  color: #F0F0F0; background: #600;
  font-family: Chunkfive, sans;
}

@import url(print.css);
@media print {
  a[href^=http]::after {
    content: attr(href)
  }
}

<!DOCTYPE html>
<title>Title</title>

<style>body {width: 500px;}</style>

<script type="application/javascript">
  function $init() {return true;}
</script>

<body>
  <p checked class="title" id='title'>Title</p>
  <!-- here goes the rest of the page -->
</body>

@requires_authorization
def somefunc(param1='', param2=0):
    r'''A docstring'''
    if param1 > param2: # interesting
        print 'Gre\'ater'
    return (param2 - param1 + 1 + 0b10l) or None

class SomeClass:
    pass

>>> message = '''interpreter
... prompt'''

CREATE TABLE "topic" (
    "id" serial NOT NULL PRIMARY KEY,
    "forum_id" integer NOT NULL,
    "subject" varchar(255) NOT NULL
);
ALTER TABLE "topic"
ADD CONSTRAINT forum_id FOREIGN KEY ("forum_id")
REFERENCES "forum" ("id");

-- Initials
insert into "topic" ("forum_id", "subject")
values (2, 'D''artagnian');

Tables

The following table has a caption. The first row is in a thead, the second row is the tfoot, and the rest is in a tbody.
The first column contain table header cells (
th elements) only; other cells are data cells (
td elements):

HTML5 Elements

Details and Summary

Figure and Figcaption

This paragraph has a
mark

Meter

• Meter
• 1 of 4
• 2 of 4
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Progress

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