HackMD/public/features.md

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Features
===
Introduction
===
<i class="fa fa-file-text"></i> HackMD is a realtime collaborate markdown note in all platforms.
This mean you can do some notes with any other in **Desktop, Tablet or even Phone**.
You can Sign in via **Facebook, Twitter, GitHub, Dropbox** in the **[homepage](/)**.
This service still in early stage, might be buggy or crash.
Please report issue in [GitHub](https://github.com/hackmdio/hackmd).
If you need instant help, please use [Facebook Message](https://www.facebook.com/messages/866415986748945).
**Thank you very much!**
Workspace
===
## Modes
**Desktop & Tablet**
<i class="fa fa-edit fa-fw"></i> Edit: See only the editor.
<i class="fa fa-eye fa-fw"></i> View: See only the result.
<i class="fa fa-columns fa-fw"></i> Both: See both in split view.
**Mobile**
<i class="fa fa-toggle-on fa-fw"></i> View: See only the result.
<i class="fa fa-toggle-off fa-fw"></i> Edit: See only the editor.
## Upload image
You can simply press the camera button <i class="fa fa-camera"></i>.
Or **drag-n-drop** image in editor, even **paste** image works!
It will automatically upload to **[imgur](http://imgur.com)**, nothing to worry :tada:
![](http://i.imgur.com/9cgQVqD.png)
## Share note
If you want to share a **editable** note, just copy the url.
If you want to share a **read-only** note, simply press share button <i class="fa fa-share-alt"></i> and copy the url.
## Save
Currently, you can save to **dropbox** <i class="fa fa-dropbox"></i> or save as **.md** <i class="fa fa-file-text"></i> to local.
## Import
Like save feature, you can also import **.md** from **dropbox** <i class="fa fa-dropbox"></i>.
Or import from your **clipboard** <i class="fa fa-clipboard"></i>, and that can parse some **html** which might be useful :smiley:
## Permission
There is a little button on the top right of the view.
You can change the permission via theres options.
It might be one of below:
<i class="fa fa-leaf fa-fw"></i> Freely: Anyone can edit this note.
<i class="fa fa-pencil fa-fw"></i> Editable: Signed user can edit this note.
<i class="fa fa-lock fa-fw"></i> Locked: Only owner can edit this note.
<i class="fa fa-hand-stop-o fa-fw"></i> Private: Only owner can view and edit this note.
**Only the owner of the note can change the permission**
## Embed
```xml
<iframe width="100%" height="500" src="http://hackmd.io/features" frameborder="0"></iframe>
```
View
===
## Table of content
You can look at bottom right place of the view area, there is a TOC button <i class="fa fa-bars"></i>.
Press that will show current table of content and will emphasis which your section on.
Support up to **three header levels**.
## Permalink
Every header will automatically add a permalink on the right side.
You can hover and click <i class="fa fa-chain"></i> to anchor on it.
Edit
===
## Shortcut keys
Just like sublime text, which is pretty quick and convinent.
> For more infomations, see [here](https://codemirror.net/demo/sublime.html).
## Auto complete
This editor provide full auto complete hint of markdown.
- Emojis: type `:` to show hint.
- Code blocks: type ` ``` ` and plus a character to show hint. <i hidden>```</i>
- Headers: type `#` to show hint.
- Referrals: type `[]` to show hint.
- Externals: type `{}` to show hint.
- Images: type `!` to show hint.
## Title
This will take the first **level 1 header** as the note title.
## Tags
Using tags like below, these will show in your **history**.
###### tags: `features` `cool` `updated`
## [YAML metadata](https://hackmd.io/IwFgZgxiBsBGCsBaAnPYAORJm07gDMImGAKYnrwDsUI8QA==)
Provide advanced note information to set the browse behavior, visit above link for detail
- robots: set search engine to index or not
- lang: set browse language
- dir: set text direction
- breaks: set to use line breaks
## Emoji
You can type any emoji like this :smile: :smiley: :cry: :wink:
> See full emoji list [here](http://www.emoji-cheat-sheet.com/)
## Todo List
- [ ] Todos
- [x] Buy some salad
- [ ] Brush teeth
- [x] Drink some water
## Code block
We support many code languages, use the auto complete to see the list.
```javascript=
var s = "JavaScript syntax highlighting";
alert(s);
function $initHighlight(block, cls) {
try {
if (cls.search(/\bno\-highlight\b/) != -1)
return process(block, true, 0x0F) +
' class=""';
} catch (e) {
/* handle exception */
}
for (var i = 0 / 2; i < classes.length; i++) {
if (checkCondition(classes[i]) === undefined)
return /\d+[\s/]/g;
}
}
```
> If you want **line numbers**, type `=` after specify the code block languagues.
> Also, you can specify the start line number.
> Like below, the line number starts from 101:
```javascript=101
var s = "JavaScript syntax highlighting";
alert(s);
function $initHighlight(block, cls) {
try {
if (cls.search(/\bno\-highlight\b/) != -1)
return process(block, true, 0x0F) +
' class=""';
} catch (e) {
/* handle exception */
}
for (var i = 0 / 2; i < classes.length; i++) {
if (checkCondition(classes[i]) === undefined)
return /\d+[\s/]/g;
}
}
```
> Or you might want to continue the previous code block line number, use `=+`
```javascript=+
var s = "JavaScript syntax highlighting";
alert(s);
```
### Blockquotes tags
> Using like below to specifiy your **name, time and color** to differ the blockquotes.
> [name=ChengHan Wu] [time=Sun, Jun 28, 2015 9:59 PM] [color=#907bf7]
> > Even support the nest blockquotes!
> > [name=ChengHan Wu] [time=Sun, Jun 28, 2015 10:00 PM] [color=red]
## Externals
### Youtube
{%youtube 1G4isv_Fylg %}
### Vimeo
{%vimeo 124148255 %}
### Gist
{%gist schacon/4277%}
### SlideShare
{%slideshare briansolis/26-disruptive-technology-trends-2016-2018-56796196 %}
### Speakerdeck
{%speakerdeck sugarenia/xxlcss-how-to-scale-css-and-keep-your-sanity %}
## MathJax
You can render *LaTeX* mathematical expressions using **MathJax**, as on [math.stackexchange.com](http://math.stackexchange.com/):
The *Gamma function* satisfying $\Gamma(n) = (n-1)!\quad\forall n\in\mathbb N$ is via the Euler integral
$$
x = {-b \pm \sqrt{b^2-4ac} \over 2a}.
$$
$$
\Gamma(z) = \int_0^\infty t^{z-1}e^{-t}dt\,.
$$
> More information about **LaTeX** mathematical expressions [here](http://meta.math.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference).
## UML diagrams
### Sequence diagrams
You can render sequence diagrams like this:
```sequence
Alice->Bob: Hello Bob, how are you?
Note right of Bob: Bob thinks
Bob-->Alice: I am good thanks!
Note left of Alice: Alice responds
Alice->Bob: Where have you been?
```
### Flow charts
And flow charts like this:
```flow
st=>start: Start
e=>end: End
op=>operation: My Operation
op2=>operation: lalala
cond=>condition: Yes or No?
st->op->op2->cond
cond(yes)->e
cond(no)->op2
```
### Graphviz
```graphviz
digraph hierarchy {
nodesep=1.0 // increases the separation between nodes
node [color=Red,fontname=Courier,shape=box] //All nodes will this shape and colour
edge [color=Blue, style=dashed] //All the lines look like this
Headteacher->{Deputy1 Deputy2 BusinessManager}
Deputy1->{Teacher1 Teacher2}
BusinessManager->ITManager
{rank=same;ITManager Teacher1 Teacher2} // Put them on the same level
}
```
> More information about **Sequence diagrams** syntax [here](http://bramp.github.io/js-sequence-diagrams/).
> More information about **Flow charts** syntax [here](http://adrai.github.io/flowchart.js/).
> More information about **Graphviz** syntax [here](http://www.tonyballantyne.com/graphs.html)
## Typography
### Headers
```
# h1 Heading
## h2 Heading
### h3 Heading
#### h4 Heading
##### h5 Heading
###### h6 Heading
```
### Horizontal rules
___
---
***
### Typographic replacements
Enable typographer option to see result.
(c) (C) (r) (R) (tm) (TM) (p) (P) +-
test.. test... test..... test?..... test!....
!!!!!! ???? ,,
Remarkable -- awesome
"Smartypants, double quotes"
'Smartypants, single quotes'
### Emphasis
**This is bold text**
__This is bold text__
*This is italic text*
_This is italic text_
~~Deleted text~~
lu~lala~
Superscript: 19^th^
Subscript: H~2~O
++Inserted text++
==Marked text==
### Blockquotes
> Blockquotes can also be nested...
>> ...by using additional greater-than signs right next to each other...
> > > ...or with spaces between arrows.
### Lists
#### Unordered
+ Create a list by starting a line with `+`, `-`, or `*`
+ Sub-lists are made by indenting 2 spaces:
- Marker character change forces new list start:
* Ac tristique libero volutpat at
+ Facilisis in pretium nisl aliquet
- Nulla volutpat aliquam velit
+ Very easy!
#### Ordered
1. Lorem ipsum dolor sit amet
2. Consectetur adipiscing elit
3. Integer molestie lorem at massa
1. You can use sequential numbers...
1. ...or keep all the numbers as `1.`
1. feafw
2. 332
3. 242
4. 2552
1. e2
Start numbering with offset:
57. foo
1. bar
### Code
Inline `code`
Indented code
// Some comments
line 1 of code
line 2 of code
line 3 of code
Block code "fences"
```
Sample text here...
```
Syntax highlighting
``` js
var foo = function (bar) {
return bar++;
};
console.log(foo(5));
```
### Tables
| Option | Description |
| ------ | ----------- |
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
Right aligned columns
| Option | Description |
| ------:| -----------:|
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
Left aligned columns
| Option | Description |
|:------ |:----------- |
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
Center aligned columns
| Option | Description |
|:------:|:-----------:|
| data | path to data files to supply the data that will be passed into templates. |
| engine | engine to be used for processing templates. Handlebars is the default. |
| ext | extension to be used for dest files. |
### Links
[link text](http://dev.nodeca.com)
[link with title](http://nodeca.github.io/pica/demo/ "title text!")
Autoconverted link https://github.com/nodeca/pica
### Images
![Minion](https://octodex.github.com/images/minion.png)
![Stormtroopocat](https://octodex.github.com/images/stormtroopocat.jpg "The Stormtroopocat")
Like links, Images also have a footnote style syntax
![Alt text][id]
With a reference later in the document defining the URL location:
[id]: https://octodex.github.com/images/dojocat.jpg "The Dojocat"
### Footnotes
Footnote 1 link[^first].
Footnote 2 link[^second].
Inline footnote^[Text of inline footnote] definition.
Duplicated footnote reference[^second].
[^first]: Footnote **can have markup**
and multiple paragraphs.
[^second]: Footnote text.
### Definition lists
Term 1
: Definition 1
with lazy continuation.
Term 2 with *inline markup*
: Definition 2
{ some code, part of Definition 2 }
Third paragraph of definition 2.
_Compact style:_
Term 1
~ Definition 1
Term 2
~ Definition 2a
~ Definition 2b
### Abbreviations
This is HTML abbreviation example.
It converts "HTML", but keep intact partial entries like "xxxHTMLyyy" and so on.
*[HTML]: Hyper Text Markup Language