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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.
Check out the list of [Integrations and Usages of Mermaid](./integrations.md)
**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.**
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.
- **true**: (default) tags in text are encoded, click functionality is disabled
- false: tags in text are allowed, click functionality is enabled
Closed issues:
⚠️ **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 resposibility 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)**
## Diagrams
### Flowchart
```
graph TD;
A-->B;
A-->C;
B-->D;
C-->D;
```
### Sequence diagram
```
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!
Things are piling up and I have a 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 of 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
### 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).
