HTML 语法和常用任务备忘单

<a href="https://example.org">
A link to example.org</a>.

<img src="beast.png" width="50" />

Used to group elements: for example,
to <span style="color:blue">style
them</span>.

<em>I'm posh</em>.

Mark a phrase in <i>italics</i>.

Bold <b>a word or phrase</b>.

<strong>I'm important!</strong>

<mark>Notice me!</mark>

<s>I'm irrelevant.</s>

H<sub>2</sub>O

Used to represent the <small>small
print </small>of a document.

<address>Main street 67</address>

For more monsters,
see <cite>The Monster Book of Monsters</cite>.

x<sup>2</sup>

<q>Me?</q>, she said.

Line 1<br>Line 2

<div style="width: 200px">
  Llanfair<wbr>pwllgwyngyll<wbr>gogerychwyrndrobwllllantysiliogogogoch.
</div>

Used to format the date. For example:
<time datetime="2020-05-24">
published on 23-05-2020</time>.

This text is in normal format,
but <code>this text is in code
format</code>.

<audio controls>
  <source src="/shared-assets/audio/t-rex-roar.mp3" type="audio/mpeg">
</audio>
        

<video controls width="250"
  src="/shared-assets/videos/flower.webm" >
  <a href="/shared-assets/videos/flower.webm">Download WebM video</a>
</video>

<p>I'm a paragraph</p>
<p>I'm another paragraph</p>

They said:
<blockquote>The blockquote element indicates
an extended quotation.</blockquote>

<details>
  <summary>HTML Cheat Sheet</summary>
  <p>Inline elements</p>
  <p>Block elements</p>
</details>

<ul>
  <li>I'm an item</li>
  <li>I'm another item</li>
</ul>

<ol>
  <li>I'm the first item</li>
  <li>I'm the second item</li>
</ol>

<dl>
  <dt>A Term</dt>
  <dd>Definition of a term</dd>
  <dt>Another Term</dt>
  <dd>Definition of another term</dd>
</dl>

before<hr>after

<h1> This is Heading 1 </h1>
<h2> This is Heading 2 </h2>
<h3> This is Heading 3 </h3>
<h4> This is Heading 4 </h4>
<h5> This is Heading 5 </h5>
<h6> This is Heading 6 </h6>