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README.md
mermaid
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 disabledloose
: 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.
mermaidAPI.initialize({
securityLevel: 'loose'
});
🖖 Keep a steady pulse: mermaid needs more Collaborators #866
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;
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!
John-->>Alice: Great!
John->>Bob: How about you?
Bob-->>John: Jolly good!
Gantt diagram
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
Class diagram - ❗ experimental
classDiagram
Class01 <|-- AveryLongClass : Cool
Class03 *-- Class04
Class05 o-- Class06
Class07 .. Class08
Class09 --> C2 : Where am i?
Class09 --* C3
Class09 --|> Class07
Class07 : equals()
Class07 : Object[] elementData
Class01 : size()
Class01 : int chimp
Class01 : int gorilla
Class08 <--> C2: Cool label
Git graph - ❗ experimental
gitGraph:
options
{
"nodeSpacing": 150,
"nodeRadius": 10
}
end
commit
branch newbranch
checkout newbranch
commit
commit
checkout master
commit
commit
merge newbranch
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
Documentation
Sibling projects
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
Setup
yarn install
Build
yarn build:watch
Lint
yarn lint
We use JavaScript Standard Style. We recommend you installing editor plugins 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 and dagre-d3 projects for providing the graphical layout and drawing libraries!
Thanks also to the js-sequence-diagram 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 has became a collaborator since April 2017.
Here is the full list of the projects contributors.