Mermaid

Mermaid is a library helping you to generate diagram and flowcharts from text, in a similar manner as Markdown.

Just insert your mermaid code in the mermaid shortcode and that’s it.

Flowchart example

{{<mermaid align="left">}}
%%{init: {'theme': 'dark', "flowchart" : { "curve" : "basis" } } }%%
graph LR;
    A[Hard edge] -->|Link text| B(Round edge)
    B --> C{Decision}
    C -->|One| D[Result one]
    C -->|Two| E[Result two]
{{< /mermaid >}}

renders as

%%{init: {'theme': 'dark', "flowchart" : { "curve" : "basis" } } }%% graph LR; A[Hard edge] -->|Link text| B(Round edge) B --> C{Decision} C -->|One| D[Result one] C -->|Two| E[Result two]

Sequence example

{{< mermaid >}}
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!
{{< /mermaid >}}

renders as

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
prevail... John-->Alice: Great! John->Bob: How about you? Bob-->John: Jolly good!

GANTT Example

{{< mermaid >}}
gantt
        dateFormat  YYYY-MM-DD
        title Adding GANTT diagram functionality to mermaid
        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
        section Critical tasks
        Completed task in the critical line :crit, done, 2014-01-06,24h
        Implement parser and jison          :crit, done, after des1, 2d
        Create tests for parser             :crit, active, 3d
        Future task in critical line        :crit, 5d
        Create tests for renderer           :2d
        Add to mermaid                      :1d
{{< /mermaid >}}

renders as

gantt dateFormat YYYY-MM-DD title Adding GANTT diagram functionality to mermaid 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 section Critical tasks Completed task in the critical line :crit, done, 2014-01-06,24h Implement parser and jison :crit, done, after des1, 2d Create tests for parser :crit, active, 3d Future task in critical line :crit, 5d Create tests for renderer :2d Add to mermaid :1d

Class example

{{< mermaid >}}
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
{{< /mermaid >}}

renders as

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 example

{{< mermaid >}}
gitGraph:
options
{
  "nodeSpacing": 150,
  "nodeRadius": 10
}
end
  commit
  branch newbranch
  checkout newbranch
  commit
  commit
  checkout master
  commit
  commit
  merge newbranch
{{< /mermaid>}}

renders as

gitGraph: options { "nodeSpacing": 150, "nodeRadius": 10 } end commit branch newbranch checkout newbranch commit commit checkout master commit commit merge newbranch

State Diagrams

{{< mermaid >}}
stateDiagram-v2
  open: Open Door
  closed: Closed Door
  locked: Locked Door
  open   --> closed: Close
  closed --> locked: Lock
  locked --> closed: Unlock
  closed --> open: Open
{{< /mermaid >}}

renders as

stateDiagram-v2 open: Open Door closed: Closed Door locked: Locked Door open --> closed: Close closed --> locked: Lock locked --> closed: Unlock closed --> open: Open