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<!-- <Remove this in the future> -->
| :mega: :mega: :mega: |
| :----: |
| * If you're upgrading from a version __< v8.2.0__, there are [non-backward-compatible changes](http://mermaid-js.github.io/mermaid/#/usage?id=to-enable-click-event-and-tags-in-nodes) related to security issues. Default behaviour of the library might have changed for your implementation.|
<!-- </Remove this in the future> -->
# mermaid [![Build Status](https://travis-ci.org/mermaid-js/mermaid.svg?branch=master)](https://travis-ci.org/mermaid-js/mermaid) [![Coverage Status](https://coveralls.io/repos/github/mermaid-js/mermaid/badge.svg?branch=master)](https://coveralls.io/github/mermaid-js/mermaid?branch=master) [![Join our Slack!](https://img.shields.io/static/v1?message=join%20chat&color=9cf&logo=slack&label=slack)](https://join.slack.com/t/mermaid-talk/shared_invite/enQtNzc4NDIyNzk4OTAyLWVhYjQxOTI2OTg4YmE1ZmJkY2Y4MTU3ODliYmIwOTY3NDJlYjA0YjIyZTdkMDMyZTUwOGI0NjEzYmEwODcwOTE) [![This project is using Percy.io for visual regression testing.](https://percy.io/static/images/percy-badge.svg)](https://percy.io/Mermaid/mermaid)
<!-- <Main description> -->
__Generate diagrams, charts, graphs or flows from markdown-like text via javascript.__
See our [documentation](http://mermaid-js.github.io/mermaid/) and start simplifying yours. Play in our [live editor](https://mermaidjs.github.io/mermaid-live-editor/) or jump straight to the [installation and usage](http://mermaid-js.github.io/mermaid/#/usage).
<!-- </Main description> -->
## New diagrams in 8.4
:trophy: _"The most exciting use of technology"_ - [JS Open Source Awards (2019)](https://osawards.com/javascript/#nominees)
With version 8.4 class diagrams has got some new features, bug fixes and documentation. Another new feature in 8.4 is the new diagram
type, state diagrams.
![Image show the two new diagram types](./img/new-diagrams.png)
## Special note regarding version 8.2
In version 8.2 a security improvement was introduced. A securityLevel configuration was introduced which sets the level of trust to be used on the parsed diagrams.
* **`strict`**: (default) tags in text are encoded, click functionality is disabled
* `loose`: tags in text are allowed, click functionality is enabled
⚠️ **Note** : This changes the default behaviour of mermaid so that after upgrade to 8.2, if the securityLevel is not configured, tags in flowcharts are encoded as tags and clicking is prohibited.
If your application is taking responsibility for the diagram source security you can set the securityLevel accordingly. By doing this clicks and tags are again allowed.
```javascript
mermaidAPI.initialize({
securityLevel: 'loose'
});
```
**🖖 Keep a steady pulse: mermaid needs more Collaborators [#866](https://github.com/knsv/mermaid/issues/866)**
![banner](./img/header.png)
Generation of diagrams and flowcharts from text in a similar manner as markdown.
Ever wanted to simplify documentation and avoid heavy tools like Visio when explaining your code?
This is why mermaid was born, a simple markdown-like script language for generating charts from text via javascript.
**Mermaid was nominated and won the JS Open Source Awards (2019) in the category _The most exciting use of technology_!!! Thanks to all involved, people committing pull requests, people answering questions and special thanks to Tyler Long who is helping me maintain the project.**
### Flowchart
```
graph TD;
A-->B;
A-->C;
B-->D;
C-->D;
```
![Flowchart](./img/flow.png)
### Sequence diagram
```
<table>
<!-- <Flowchart> -->
<tr><td colspan=2 align="center">
<b>Flow</b></br>
[<a href="http://mermaid-js.github.io/mermaid/#/flowchart">docs</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0hhcmRdIC0tPnxUZXh0fCBCKFJvdW5kKVxuICAgIEIgLS0-IEN7RGVjaXNpb259XG4gICAgQyAtLT58T25lfCBEW1Jlc3VsdCAxXVxuICAgIEMgLS0-fFR3b3wgRVtSZXN1bHQgMl0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9fQ">live editor</a>]
</td></tr>
<tr>
<td><pre>
graph TD
A[Hard] -->|Text| B(Round)
B --> C{Decision}
C -->|One| D[Result 1]
C -->|Two| E[Result 2]
</pre></td>
<td align="center">
<img src="./img/gray-flow.png" />
</td>
</tr>
<!-- </Flowchart> -->
<!-- <Sequence> -->
<tr><td colspan=2 align="center">
<b>Sequence</b><br />
[<a href="http://mermaid-js.github.io/mermaid/#/sequenceDiagram">docs</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoic2VxdWVuY2VEaWFncmFtXG5BbGljZS0-PkpvaG46IEhlbGxvIEpvaG4sIGhvdyBhcmUgeW91P1xubG9vcCBIZWFsdGhjaGVja1xuICAgIEpvaG4tPj5Kb2huOiBGaWdodCBhZ2FpbnN0IGh5cG9jaG9uZHJpYVxuZW5kXG5Ob3RlIHJpZ2h0IG9mIEpvaG46IFJhdGlvbmFsIHRob3VnaHRzIVxuSm9obi0tPj5BbGljZTogR3JlYXQhXG5Kb2huLT4-Qm9iOiBIb3cgYWJvdXQgeW91P1xuQm9iLS0-PkpvaG46IEpvbGx5IGdvb2QhIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
</td></tr>
<tr>
<td><pre>
sequenceDiagram
participant Alice
participant Bob
Alice->>John: Hello John, how are you?
loop Healthcheck
John->>John: Fight against hypochondria
end
Note right of John: Rational thoughts <br/>prevail!
Note right of John: Rational thoughts!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
```
![Sequence diagram](./img/sequence.png)
### Gantt diagram
```
</pre></td>
<td align="center">
<img src="./img/gray-sequence.png" />
</td>
</tr>
<!-- </Sequence> -->
<!-- <Gantt> -->
<tr><td colspan=2 align="center">
<b>Gantt</b><br />
[<a href="http://mermaid-js.github.io/mermaid/#/gantt">docs</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiZ2FudHRcbnNlY3Rpb24gU2VjdGlvblxuQ29tcGxldGVkIDpkb25lLCAgICBkZXMxLCAyMDE0LTAxLTA2LDIwMTQtMDEtMDhcbkFjdGl2ZSAgICAgICAgOmFjdGl2ZSwgIGRlczIsIDIwMTQtMDEtMDcsIDNkXG5QYXJhbGxlbCAxICAgOiAgICAgICAgIGRlczMsIGFmdGVyIGRlczEsIDFkXG5QYXJhbGxlbCAyICAgOiAgICAgICAgIGRlczQsIGFmdGVyIGRlczEsIDFkXG5QYXJhbGxlbCAzICAgOiAgICAgICAgIGRlczUsIGFmdGVyIGRlczMsIDFkXG5QYXJhbGxlbCA0ICAgOiAgICAgICAgIGRlczYsIGFmdGVyIGRlczQsIDFkIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
</td></tr>
<tr>
<td><pre>
gantt
dateFormat YYYY-MM-DD
title Adding GANTT diagram to mermaid
excludes weekdays 2014-01-10
section A section
Completed task :done, des1, 2014-01-06,2014-01-08
Active task :active, des2, 2014-01-09, 3d
Future task : des3, after des2, 5d
Future task2 : des4, after des3, 5d
```
![Gantt diagram](./img/gantt.png)
### Class diagram - :exclamation: experimental
```
section Section
Completed :done, des1, 2014-01-06,2014-01-08
Active :active, des2, 2014-01-07, 3d
Parallel 1 : des3, after des1, 1d
Parallel 2 : des4, after des1, 1d
Parallel 3 : des5, after des3, 1d
Parallel 4 : des6, after des4, 1d
</pre></td>
<td align="center">
<img src="./img/gray-gantt.png" />
</td>
</tr>
<!-- </Gantt> -->
<!-- <Class> -->
<tr><td colspan=2 align="center">
<b>Class</b><br />
[<a href="http://mermaid-js.github.io/mermaid/#/classDiagram">docs</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiY2xhc3NEaWFncmFtXG5DbGFzczAxIDx8LS0gQXZlcnlMb25nQ2xhc3MgOiBDb29sXG48PGludGVyZmFjZT4-IENsYXNzMDFcbkNsYXNzMDkgLS0-IEMyIDogV2hlcmUgYW0gaT9cbkNsYXNzMDkgLS0qIEMzXG5DbGFzczA5IC0tfD4gQ2xhc3MwN1xuQ2xhc3MwNyA6IGVxdWFscygpXG5DbGFzczA3IDogT2JqZWN0W10gZWxlbWVudERhdGFcbkNsYXNzMDEgOiBzaXplKClcbkNsYXNzMDEgOiBpbnQgY2hpbXBcbkNsYXNzMDEgOiBpbnQgZ29yaWxsYVxuY2xhc3MgQ2xhc3MxMCB7XG4gID4-c2VydmljZT4-XG4gIGludCBpZFxuICBzaXplKClcbn0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9fQ">live editor</a>]
</td></tr>
<tr>
<td><pre>
classDiagram
Class01 <|-- AveryLongClass : Cool
<<interface>> Class01
Class03 *-- Class04
Class05 o-- Class06
Class07 .. Class08
Class01 &lt;|-- AveryLongClass : Cool
&lt;&lt;interface>> Class01
Class09 --> C2 : Where am i?
Class09 --* C3
Class09 --|> Class07
@ -102,147 +92,84 @@ Class07 : Object[] elementData
Class01 : size()
Class01 : int chimp
Class01 : int gorilla
Class08 <--> C2: Cool label
class Class10 {
<<service>>
&lt;&lt;service>>
int id
size()
}
```
![Class diagram](./img/class.png)
</pre></td>
<td align="center">
<img src="./img/gray-class.png" />
</td>
</tr>
<!-- </Class> -->
<!-- <State> -->
<tr><td colspan=2 align="center">
<b>State</b><br />
[<a href="http://mermaid-js.github.io/mermaid/#/stateDiagram">docs</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoic3RhdGVEaWFncmFtXG4gICAgWypdIC0tPiBTdGlsbFxuICAgIFN0aWxsIC0tPiBbKl1cbiAgICBTdGlsbCAtLT4gTW92aW5nXG4gICAgTW92aW5nIC0tPiBTdGlsbFxuICAgIE1vdmluZyAtLT4gQ3Jhc2hcbiAgICBDcmFzaCAtLT4gWypdIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
</td></tr>
<tr>
<td><pre>
stateDiagram
[*] --> Still
Still --> [*]
Still --> Moving
Moving --> Still
Moving --> Crash
Crash --> [*]
</pre></td>
<td align="center">
<img src="./img/gray-state.png" />
</td>
</tr>
<!-- </State> -->
<!-- <Pie> -->
<tr><td colspan=2 align="center">
<b>Pie</b><br />
[<a href="http://mermaid-js.github.io/mermaid/#/pie">docs</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoicGllXG5cIkRvZ3NcIiA6IDQyLjk2XG5cIkNhdHNcIiA6IDUwLjA1XG5cIlJhdHNcIiA6IDEwLjAxIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
</td></tr>
<tr>
<td><pre>
pie
"Dogs" : 386
"Cats" : 85
"Rats" : 15
</pre></td>
<td align="center">
<img src="./img/gray-pie.png" />
</td>
</tr>
<!-- </Pie> -->
<!-- <Git> -->
<tr><td colspan=2 align="center">
<b>Git</b><br />
[experimental - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiZ2l0R3JhcGg6XG5vcHRpb25zXG57XG4gICAgXCJub2RlU3BhY2luZ1wiOiAxNTAsXG4gICAgXCJub2RlUmFkaXVzXCI6IDEwXG59XG5lbmRcbmNvbW1pdFxuYnJhbmNoIG5ld2JyYW5jaFxuY2hlY2tvdXQgbmV3YnJhbmNoXG5jb21taXRcbmNvbW1pdFxuY2hlY2tvdXQgbWFzdGVyXG5jb21taXRcbmNvbW1pdFxubWVyZ2UgbmV3YnJhbmNoXG4iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9fQ">live editor</a>]
</td></tr>
<tr>
<td colspan="2" align="center"><i>Coming soon!</i></td>
</tr>
<!-- </Git> -->
</table>
## Related projects
### Git graph - :exclamation: experimental
- [Command Line Interface](https://github.com/mermaid-js/mermaid.cli)
- [Live Editor](https://github.com/mermaid-js/mermaid-live-editor)
```
gitGraph:
options
{
"nodeSpacing": 150,
"nodeRadius": 10
}
end
commit
branch newbranch
checkout newbranch
commit
commit
checkout master
commit
commit
merge newbranch
# Contributors [![Help wanted](https://img.shields.io/github/labels/mermaid-js/mermaid/Help%20wanted!)](https://github.com/mermaid-js/mermaid/issues?q=is%3Aissue+is%3Aopen+label%3A%22Help+wanted%21%22) [![Contributors](https://img.shields.io/github/contributors/mermaid-js/mermaid)](https://github.com/mermaid-js/mermaid/graphs/contributors) [![Commits](https://img.shields.io/github/commit-activity/m/mermaid-js/mermaid)](https://github.com/mermaid-js/mermaid/graphs/contributors)
```
Mermaid is a growing community and is always accepting new contributors. There's a lot of different ways to help out and we're always looking for extra hands! Look at [this issue](https://github.com/mermaid-js/mermaid/issues/866) if you want to know where to start helping out.
![Git graph](./img/git.png)
Detailed information about how to contribute can be found in the [contribution guide](CONTRIBUTING.md)
# Appreciation
A quick note from Knut Sveidqvist:
>*Many thanks to the [d3](http://d3js.org/) and [dagre-d3](https://github.com/cpettitt/dagre-d3) projects for providing the graphical layout and drawing libraries!*
>*Thanks also to the [js-sequence-diagram](http://bramp.github.io/js-sequence-diagrams) project for usage of the grammar for the sequence diagrams. Thanks to Jessica Peter for inspiration and starting point for gantt rendering.*
>*Thank you to [Tyler Long](https://github.com/tylerlong) who has been a collaborator since April 2017.*
>
>*Thank you to the ever-growing list of [contributors](https://github.com/knsv/mermaid/graphs/contributors) that brought the project this far!*
## Installation
### CDN
https://unpkg.com/mermaid@<version>/dist/
Replace `<version>` with expected version number.
Example: https://unpkg.com/mermaid@7.1.0/dist/
### Node.js
yarn add mermaid
### Preview builds
Preview builds are created automatically for each release. They can be found in the [GitHub registry](https://github.com/knsv/mermaid/packages).
Make sure to configure npm to use the GitHub package registry. Steps for that can be found [here](https://help.github.com/en/articles/configuring-npm-for-use-with-github-package-registry).
If you want to get the latest preview for the next release
```
yarn add @knsv/mermaid
```
If you want to get the latest preview for a specific version
```
yarn add @knsv/mermaid@<version>
```
## Documentation
https://mermaidjs.github.io
## Sibling projects
- [mermaid CLI](https://github.com/mermaidjs/mermaid.cli)
- [mermaid live editor](https://github.com/mermaidjs/mermaid-live-editor)
- [mermaid webpack demo](https://github.com/mermaidjs/mermaid-webpack-demo)
- [mermaid Parcel demo](https://github.com/mermaidjs/mermaid-parcel-demo)
# Request for assistance
Things are piling up and I have hard time keeping up. To remedy this
it would be great if we could form a core team of developers to cooperate
with the future development mermaid.
As part of this team you would get write access to the repository and would
represent the project when answering questions and issues.
Together we could continue the work with things like:
* adding more types of diagrams like mindmaps, ert diagrams etc
* improving existing diagrams
Don't hesitate to contact me if you want to get involved.
# For contributors
Detailed information about contributing can be found in the [Contribution guide](CONTRIBUTING.md)
## Setup
yarn install
## Build
yarn build:watch
## Lint
yarn lint
We use [eslint](https://eslint.org/).
We recommend you installing [editor plugins](https://eslint.org/docs/user-guide/integrations) so you can get real time lint result.
## Test
yarn test
Manual test in browser:
open dist/index.html
## Release
For those who have the permission to do so:
Update version number in `package.json`.
npm publish
Command above generates files into the `dist` folder and publishes them to npmjs.org.
# Credits
Many thanks to the [d3](http://d3js.org/) and [dagre-d3](https://github.com/cpettitt/dagre-d3) projects for providing the graphical layout and drawing libraries!
Thanks also to the [js-sequence-diagram](http://bramp.github.io/js-sequence-diagrams) project for usage of the grammar for the sequence diagrams. Thanks to Jessica Peter for inspiration and starting point for gantt rendering.
---
*Mermaid was created by Knut Sveidqvist for easier documentation.*
*[Tyler Long](https://github.com/tylerlong) has became a collaborator since April 2017.*
Here is the full list of the projects [contributors](https://github.com/knsv/mermaid/graphs/contributors).

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