<p>A collection of Markdown code and tricks that were tested to work in Gist.</p>
<p>This and all public gists in <a href="https://gist.github.com/ww9">https://gist.github.com/ww9</a> are <a href="https://en.wikipedia.org/wiki/Public_domain_equivalent_license">Public Domain</a>. Do whatever you want with it including , no need to credit me.</p>
<h2 id="todo">Todo</h2>
<ul>
<li>Reformat this whole document and assimilate these:<ul>
<li><a href="https://gist.github.com/jonschlinkert/5854601">https://gist.github.com/jonschlinkert/5854601</a></li>
<li><a href="https://gist.github.com/ringmatthew/9f7bbfd102003963f9be7dbcf7d40e51">https://gist.github.com/ringmatthew/9f7bbfd102003963f9be7dbcf7d40e51</a></li>
<li><a href="https://gist.github.com/DavidWells/7d2e0e1bc78f4ac59a123ddf8b74932d">https://gist.github.com/DavidWells/7d2e0e1bc78f4ac59a123ddf8b74932d</a></li>
<li><a href="https://gist.github.com/haydenk/958b433ee107537bb166b98b59262b2a">https://gist.github.com/haydenk/958b433ee107537bb166b98b59262b2a</a></li>
<li><a href="https://gist.github.com/asabaylus/3071099">https://gist.github.com/asabaylus/3071099</a></li>
<li><a href="https://gist.github.com/t-nissie/9580883">https://gist.github.com/t-nissie/9580883</a> (Add images, secret gists, anti-spam protection)</li>
<li><a href="https://guides.github.com/features/mastering-markdown/">https://guides.github.com/features/mastering-markdown/</a></li>
<li><a href="https://gist.github.com/cyhsutw/d5983d166fb70ff651f027b2aa56ee4e#file-mathjax-ipynb">https://gist.github.com/cyhsutw/d5983d166fb70ff651f027b2aa56ee4e#file-mathjax-ipynb</a> (Python notebook, Math syntax)</li>
</ul>
</li>
</ul>
<h2 id="table-of-contents">Table of Contents</h2>
<p><a href="#task-lists">Task List / To Do List</a><br><a href="#collapsible-content-spoilers">Collapsible content</a><br><a href="#headers">Headers</a><br><a href="#emphasis">Emphasis</a><br><a href="#lists">Lists</a><br><a href="#links">Links</a><br><a href="#images">Images</a><br><a href="#code-and-syntax-highlighting">Code and Syntax Highlighting</a><br><a href="#tables">Tables</a><br><a href="#blockquotes">Blockquotes</a><br><a href="#inline-html">Inline HTML</a><br><a href="#horizontal-rule">Horizontal Rule</a><br><a href="#line-breaks">Line Breaks</a><br><a href="#youtube-videos">YouTube Videos</a><br><a href="#tex-mathematical-formulae">TeX Mathematical Formulae</a>  </p>
<h2 id="task-lists">Task lists</h2>
<pre><code class="hljs language-markdown"><span class="hljs-bullet">-</span> [x] Task 1
<span class="hljs-bullet">-</span> [ ] Task 2
<span class="hljs-bullet">-</span> [ ] Task 3
</code></pre>
<p>Result:</p>
<ul>
<li><input checked="" disabled="" type="checkbox"> Task 1</li>
<li><input disabled="" type="checkbox"> Task 2</li>
<li><input disabled="" type="checkbox"> Task 3</li>
</ul>
<h2 id="collapsible-content-spoilers">Collapsible content (spoilers)</h2>
<details>
<summary>Click me to expand</summary>

<p>Content between &lt;details&gt; and &lt;/details&gt; is hidden. You need to <a href="https://www.freeformatter.com/html-escape.html">escape HTML</a> tags them.</p>
<pre><code class="hljs language-python"><span class="hljs-built_in">print</span>(<span class="hljs-string">&quot;hello world!&quot;</span>)
</code></pre>
</details>

<h2 id="headers">Headers</h2>
<pre><code># H1
## H2
### H3
#### H4
##### H5
###### H6

Alternatively, for H1 and H2, an underline-ish style:

Alt-H1
======

Alt-H2
------
</code></pre>
<h1 id="h1">H1</h1>
<h2 id="h2">H2</h2>
<h3 id="h3">H3</h3>
<h4 id="h4">H4</h4>
<h5 id="h5">H5</h5>
<h6 id="h6">H6</h6>
<p>Alternatively, for H1 and H2, an underline-ish style:</p>
<h1 id="alt-h1">Alt-H1</h1>
<h2 id="alt-h2">Alt-H2</h2>
<h2 id="emphasis">Emphasis</h2>
<pre><code>Emphasis, aka italics, with *asterisks* or _underscores_.

Strong emphasis, aka bold, with **asterisks** or __underscores__.

Combined emphasis with **asterisks and _underscores_**.

Strikethrough uses two tildes. ~~Scratch this.~~
</code></pre>
<p>Emphasis, aka italics, with <em>asterisks</em> or <em>underscores</em>.</p>
<p>Strong emphasis, aka bold, with <strong>asterisks</strong> or <strong>underscores</strong>.</p>
<p>Combined emphasis with <strong>asterisks and <em>underscores</em></strong>.</p>
<p>Strikethrough uses two tildes. <del>Scratch this.</del></p>
<h2 id="lists">Lists</h2>
<pre><code>1. First ordered list item
2. Another item
  * Unordered sub-list. 
1. Actual numbers don&#x27;t matter, just that it&#x27;s a number
  1. Ordered sub-list
4. And another item.  
   
   Some text that should be aligned with the above item.

* Unordered list can use asterisks
- Or minuses
+ Or pluses
</code></pre>
<ol>
<li>First ordered list item</li>
<li>Another item</li>
</ol>
<ul>
<li>Unordered sub-list.</li>
</ul>
<ol>
<li>Actual numbers don&#39;t matter, just that it&#39;s a number</li>
<li>Ordered sub-list</li>
<li>And another item.<br>Some text that should be aligned with the above item.</li>
</ol>
<ul>
<li>Unordered list can use asterisks</li>
</ul>
<ul>
<li>Or minuses</li>
</ul>
<ul>
<li>Or pluses</li>
</ul>
<h2 id="links">Links</h2>
<p>There are two ways to create links.</p>
<pre><code>[I&#x27;m an inline-style link](https://www.google.com)

[I&#x27;m a reference-style link][Arbitrary case-insensitive reference text]

[You can use numbers for reference-style link definitions][1]

Or leave it empty and use the [link text itself]

URLs and URLs in angle brackets will automatically get turned into links. 
http://www.example.com or &lt;http://www.example.com&gt; and sometimes 
example.com (but not on Github, for example).

Some text to show that the reference links can follow later.

[arbitrary case-insensitive reference text]: https://www.mozilla.org
[1]: http://slashdot.org
[link text itself]: http://www.reddit.com
</code></pre>
<p><a href="https://www.google.com">I&#39;m an inline-style link</a></p>
<p><a href="https://www.mozilla.org">I&#39;m a reference-style link</a></p>
<p><a href="http://slashdot.org">You can use numbers for reference-style link definitions</a></p>
<p>Or leave it empty and use the <a href="http://www.reddit.com">link text itself</a></p>
<p>URLs and URLs in angle brackets will automatically get turned into links. 
<a href="http://www.example.com">http://www.example.com</a> or <a href="http://www.example.com">http://www.example.com</a> and sometimes 
example.com (but not on Github, for example).</p>
<p>Some text to show that the reference links can follow later.</p>
<h2 id="images">Images</h2>
<pre><code>Here&#x27;s our logo (hover to see the title text):

Inline-style: 
![alt text](https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png &quot;Logo Title Text 1&quot;)

Reference-style: 
![alt text][logo]

[logo]: https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png &quot;Logo Title Text 2&quot;
</code></pre>
<p>Here&#39;s our logo (hover to see the title text):</p>
<p>Inline-style: 
<img src="https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png" alt="alt text" title="Logo Title Text 1"></p>
<p>Reference-style: 
<img src="https://github.com/adam-p/markdown-here/raw/master/src/common/images/icon48.png" alt="alt text" title="Logo Title Text 2"></p>
<h2 id="code-and-syntax-highlighting">Code and Syntax Highlighting</h2>
<p>Code blocks are part of the Markdown spec, but syntax highlighting isn&#39;t. However, many renderers -- like Github&#39;s and <em>Markdown Here</em> -- support syntax highlighting. <em>Markdown Here</em> supports highlighting for dozens of languages (and not-really-languages, like diffs and HTTP headers); to see the complete list, and how to write the language names, see the <a href="http://softwaremaniacs.org/media/soft/highlight/test.html">highlight.js demo page</a>.</p>
<pre><code>Inline `code` has `back-ticks around` it.
</code></pre>
<p>Inline <code>code</code> has <code>back-ticks around</code> it.</p>
<p>Blocks of code are either fenced by lines with three back-ticks <code>```</code>, or are indented with four spaces. I recommend only using the fenced code blocks -- they&#39;re easier and only they support syntax highlighting.</p>
<pre lang="nohighlight"><code>```javascript
var s = "JavaScript syntax highlighting";
alert(s);
```

```python
s = "Python syntax highlighting"
print s
```

```
No language indicated, so no syntax highlighting. 
But let's throw in a &lt;b&gt;tag&lt;/b&gt;.
```
</code></pre>



<pre><code class="hljs language-javascript"><span class="hljs-keyword">var</span> s = <span class="hljs-string">&quot;JavaScript syntax highlighting&quot;</span>;
<span class="hljs-title function_">alert</span>(s);
</code></pre>
<pre><code class="hljs language-python">s = <span class="hljs-string">&quot;Python syntax highlighting&quot;</span>
<span class="hljs-built_in">print</span> s
</code></pre>
<pre><code>No language indicated, so no syntax highlighting in Markdown Here (varies on Github). 
But let&#x27;s throw in a &lt;b&gt;tag&lt;/b&gt;.
</code></pre>
<p>Again, to see what languages are available for highlighting, and how to write those language names, see the <a href="http://softwaremaniacs.org/media/soft/highlight/test.html">highlight.js demo page</a>.</p>
<h2 id="tables">Tables</h2>
<p>Tables aren&#39;t part of the core Markdown spec, but they are part of GFM and <em>Markdown Here</em> supports them. They are an easy way of adding tables to your email -- a task that would otherwise require copy-pasting from another application.</p>
<pre><code class="hljs language-plaintext">Colons can be used to align columns.

| Tables        | Are           | Cool  |
| ------------- |:-------------:| -----:|
| col 3 is      | right-aligned | $1600 |
| col 2 is      | centered      |   $12 |
| zebra stripes | are neat      |    $1 |

The outer pipes (|) are optional, and you don&#x27;t need to make the raw Markdown line up prettily. You can also use inline Markdown.

Markdown | Less | Pretty
--- | --- | ---
*Still* | `renders` | **nicely**
1 | 2 | 3
</code></pre>
<p>Colons can be used to align columns.</p>
<table>
<thead>
<tr>
<th>Tables</th>
<th align="center">Are</th>
<th align="right">Cool</th>
</tr>
</thead>
<tbody><tr>
<td>col 3 is</td>
<td align="center">right-aligned</td>
<td align="right">$1600</td>
</tr>
<tr>
<td>col 2 is</td>
<td align="center">centered</td>
<td align="right">$12</td>
</tr>
<tr>
<td>zebra stripes</td>
<td align="center">are neat</td>
<td align="right">$1</td>
</tr>
</tbody></table>
<p>The outer pipes (|) are optional, and you don&#39;t need to make the raw Markdown line up prettily. You can also use inline Markdown.</p>
<table>
<thead>
<tr>
<th>Markdown</th>
<th>Less</th>
<th>Pretty</th>
</tr>
</thead>
<tbody><tr>
<td><em>Still</em></td>
<td><code>renders</code></td>
<td><strong>nicely</strong></td>
</tr>
<tr>
<td>1</td>
<td>2</td>
<td>3</td>
</tr>
</tbody></table>
<h2 id="blockquotes">Blockquotes</h2>
<pre><code>&gt; Blockquotes are very handy in email to emulate reply text.
&gt; This line is part of the same quote.

Quote break.

&gt; This is a very long line that will still be quoted properly when it wraps. Oh boy let&#x27;s keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can *put* **Markdown** into a blockquote. 
</code></pre>
<blockquote>
<p>Blockquotes are very handy in email to emulate reply text.
This line is part of the same quote.</p>
</blockquote>
<p>Quote break.</p>
<blockquote>
<p>This is a very long line that will still be quoted properly when it wraps. Oh boy let&#39;s keep writing to make sure this is long enough to actually wrap for everyone. Oh, you can <em>put</em> <strong>Markdown</strong> into a blockquote. </p>
</blockquote>
<h2 id="inline-html">Inline HTML</h2>
<p>You can also use raw HTML in your Markdown, and it&#39;ll mostly work pretty well. </p>
<pre><code>&lt;dl&gt;
  &lt;dt&gt;Definition list&lt;/dt&gt;
  &lt;dd&gt;Is something people use sometimes.&lt;/dd&gt;

  &lt;dt&gt;Markdown in HTML&lt;/dt&gt;
  &lt;dd&gt;Does *not* work **very** well. Use HTML &lt;em&gt;tags&lt;/em&gt;.&lt;/dd&gt;
&lt;/dl&gt;
</code></pre>
<dl>
  <dt>Definition list</dt>
  <dd>Is something people use sometimes.</dd>

  <dt>Markdown in HTML</dt>
  <dd>Does *not* work **very** well. Use HTML <em>tags</em>.</dd>
</dl>

<h2 id="horizontal-rule">Horizontal Rule</h2>
<pre><code>Three or more...

---

Hyphens

***

Asterisks

___

Underscores
</code></pre>
<p>Three or more...</p>
<hr>
<p>Hyphens</p>
<hr>
<p>Asterisks</p>
<hr>
<p>Underscores</p>
<h2 id="line-breaks">Line Breaks</h2>
<p>My basic recommendation for learning how line breaks work is to experiment and discover -- hit &lt;Enter&gt; once (i.e., insert one newline), then hit it twice (i.e., insert two newlines), see what happens. You&#39;ll soon learn to get what you want. &quot;Markdown Toggle&quot; is your friend. </p>
<p>Here are some things to try out:</p>
<pre><code>Here&#x27;s a line for us to start with.

This line is separated from the one above by two newlines, so it will be a *separate paragraph*.

This line is also a separate paragraph, but...
This line is only separated by a single newline, so it&#x27;s a separate line in the *same paragraph*.
</code></pre>
<p>Here&#39;s a line for us to start with.</p>
<p>This line is separated from the one above by two newlines, so it will be a <em>separate paragraph</em>.</p>
<p>This line is also begins a separate paragraph, but...<br>This line is only separated by a single newline, so it&#39;s a separate line in the <em>same paragraph</em>.</p>
<p>(Technical note: <em>Markdown Here</em> uses GFM line breaks, so there&#39;s no need to use MD&#39;s two-space line breaks.)</p>
<h2 id="youtube-videos">YouTube Videos</h2>
<p>They can&#39;t be added directly but you can add an image with a link to the video like this:</p>
<pre><code>&lt;a href=&quot;http://www.youtube.com/watch?feature=player_embedded&amp;v=YOUTUBE_VIDEO_ID_HERE
&quot; target=&quot;_blank&quot;&gt;&lt;img src=&quot;http://img.youtube.com/vi/YOUTUBE_VIDEO_ID_HERE/0.jpg&quot; 
alt=&quot;IMAGE ALT TEXT HERE&quot; width=&quot;240&quot; height=&quot;180&quot; border=&quot;10&quot; /&gt;&lt;/a&gt;
</code></pre>
<p>Or, in pure Markdown, but losing the image sizing and border:</p>
<pre><code>[![IMAGE ALT TEXT HERE](http://img.youtube.com/vi/YOUTUBE_VIDEO_ID_HERE/0.jpg)](http://www.youtube.com/watch?v=YOUTUBE_VIDEO_ID_HERE)
</code></pre>
<h2 id="tex-mathematical-formulae">TeX Mathematical Formulae</h2>
<p>A full description of TeX math symbols is beyond the scope of this cheatsheet. Here&#39;s a <a href="https://en.wikibooks.org/wiki/LaTeX/Mathematics">good reference</a>, and you can try stuff out on <a href="https://www.codecogs.com/latex/eqneditor.php">CodeCogs</a>. You can also play with formulae in the Markdown Here options page.</p>
<p>Here are some examples to try out:</p>
<pre><code>$-b \pm \sqrt{b^2 - 4ac} \over 2a$
$x = a_0 + \frac{1}{a_1 + \frac{1}{a_2 + \frac{1}{a_3 + a_4}}}$
$\forall x \in X, \quad \exists y \leq \epsilon$
</code></pre>
<p>The beginning and ending dollar signs (<code>$</code>) are the delimiters for the TeX markup.</p>


Markdown Example

<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Praesent elementum facilisis leo vel fringilla est ullamcorper eget. At imperdiet dui accumsan sit amet nulla facilities morbi tempus. Praesent elementum facilisis leo vel fringilla. Congue mauris rhoncus aenean vel. Egestas sed tempus urna et pharetra pharetra massa massa ultricies.</p>
<p>Venenatis cras sed felis eget velit. Consectetur libero id faucibus nisl tincidunt. Gravida in fermentum et sollicitudin ac orci phasellus egestas tellus. Volutpat consequat mauris nunc congue nisi vitae. Id aliquet risus feugiat in ante metus dictum at tempor. Sed blandit libero volutpat sed cras. Sed odio morbi quis commodo odio aenean sed adipiscing. Velit euismod in pellentesque massa placerat. Mi bibendum neque egestas congue quisque egestas diam in arcu. Nisi lacus sed viverra tellus in. Nibh cras pulvinar mattis nunc sed. Luctus accumsan tortor posuere ac ut consequat semper viverra. Fringilla ut morbi tincidunt augue interdum velit euismod.</p>
<h2 id="lorem-ipsum">Lorem Ipsum</h2>
<p>Tristique senectus et netus et malesuada fames ac turpis. Ridiculous mus mauris vitae ultricies leo integer malesuada nunc vel. In mollis nunc sed id semper. Egestas tellus rutrum tellus pellentesque. Phasellus vestibulum lorem sed risus ultricies tristique nulla. Quis blandit turpis cursus in hac habitasse platea dictumst quisque. Eros donec ac odio tempor orci dapibus ultrices. Aliquam sem et tortor consequat id porta nibh. Adipiscing elit duis tristique sollicitudin nibh sit amet commodo nulla. Diam vulputate ut pharetra sit amet. Ut tellus elementum sagittis vitae et leo. Arcu non odio euismod lacinia at quis risus sed vulputate.</p>


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