Mermaid

 1{{< mermaid >}}
 2sequenceDiagram
 3  participant Alice
 4  participant Bob
 5  Alice->>John: Hello John, how are you?
 6  loop Healthcheck
 7      John->>John: Fight against hypochondria
 8  end
 9  Note right of John: Rational thoughts<br/>prevail...
10  John-->>Alice: Great!
11  John->>Bob: How about you?
12  Bob-->>John: Jolly good!
13{{< /mermaid >}}

 1{{< mermaid >}}
 2flowchart TB
 3  c1-->a2
 4  subgraph one
 5  a1-->a2
 6  end
 7  subgraph two
 8  b1-->b2
 9  end
10  subgraph three
11  c1-->c2
12  end
13  one --> two
14  three --> two
15  two --> c2
16{{< /mermaid >}}

 1{{< mermaid >}}
 2graph TB
 3  sq[Square shape] --> ci((Circle shape))
 4
 5  subgraph A
 6    od>Odd shape]-- Two line<br/>edge comment --> ro
 7    di{Diamond with <br/> line break} -.-> ro(Rounded<br>square<br>shape)
 8    di==>ro2(Rounded square shape)
 9  end
10
11  %% Notice that no text in shape are added here instead that is appended further down
12  e --> od3>Really long text with linebreak<br>in an Odd shape]
13
14  %% Comments after double percent signs
15  e((Inner / circle<br>and some odd <br>special characters)) --> f(,.?!+-*ز)
16
17  cyr[Cyrillic]-->cyr2((Circle shape Начало));
18
19    classDef green fill:#9f6,stroke:#333,stroke-width:2px;
20    classDef orange fill:#f96,stroke:#333,stroke-width:4px;
21    class sq,e green
22    class di orange
23{{< /mermaid >}}

1{{< mermaid >}}
2graph LR
3  A[Hard edge] -->|Link text| B(Round edge)
4  B --> C{Decision}
5  C -->|One| D[Result one]
6  C -->|Two| E[Result two]
7{{< /mermaid >}}

1{{< mermaid >}}
2erDiagram
3  CUSTOMER ||--o{ ORDER : places
4  ORDER ||--|{ LINE-ITEM : contains
5  CUSTOMER }|..|{ DELIVERY-ADDRESS : uses
6{{< /mermaid >}}

 1{{< mermaid >}}
 2journey
 3  title My working day
 4  section Go to work
 5    Make tea: 5: Me
 6    Go upstairs: 3: Me
 7    Do work: 1: Me, Cat
 8  section Go home
 9    Go downstairs: 5: Me
10    Sit down: 5: Me
11{{< /mermaid >}}

 1{{< mermaid >}}
 2gantt
 3  dateFormat  YYYY-MM-DD
 4  title       Adding GANTT diagram functionality to mermaid
 5  excludes    weekends
 6  %% (`excludes` accepts specific dates in YYYY-MM-DD format, days of the week ("sunday") or "weekends", but not the word "weekdays".)
 7
 8  section A section
 9  Completed task            :done,    des1, 2014-01-06,2014-01-08
10  Active task               :active,  des2, 2014-01-09, 3d
11  Future task               :         des3, after des2, 5d
12  Future task2              :         des4, after des3, 5d
13
14  section Critical tasks
15  Completed task in the critical line :crit, done, 2014-01-06,24h
16  Implement parser and jison          :crit, done, after des1, 2d
17  Create tests for parser             :crit, active, 3d
18  Future task in critical line        :crit, 5d
19  Create tests for renderer           :2d
20  Add to mermaid                      :1d
21
22  section Documentation
23  Describe gantt syntax               :active, a1, after des1, 3d
24  Add gantt diagram to demo page      :after a1  , 20h
25  Add another diagram to demo page    :doc1, after a1  , 48h
26
27  section Last section
28  Describe gantt syntax               :after doc1, 3d
29  Add gantt diagram to demo page      :20h
30  Add another diagram to demo page    :48h
31{{< /mermaid >}}

1{{< mermaid >}}
2pie
3  title Key elements in Product X
4  "Calcium" : 42.96
5  "Potassium" : 50.05
6  "Magnesium" : 10.01
7  "Iron" :  5
8{{< /mermaid >}}