Examples

This page contains a collection of examples of diagrams and charts that can be created through mermaid and its myriad applications.

If you wish to learn how to support mermaid on your webpage, read the Beginner's Guide.

If you wish to learn about mermaid's syntax, Read the Diagram Syntax section.

Basic Pie Chart

pie title NETFLIX
         "Time spent looking for movie" : 90
         "Time spent watching it" : 10
pie title NETFLIX "Time spent looking for movie" : 90 "Time spent watching it" : 10
pie title What Voldemort doesn't have?
         "FRIENDS" : 2
         "FAMILY" : 3
         "NOSE" : 45
pie title What Voldemort doesn't have? "FRIENDS" : 2 "FAMILY" : 3 "NOSE" : 45

Basic sequence diagram

sequenceDiagram
    Alice ->> Bob: Hello Bob, how are you?
    Bob-->>John: How about you John?
    Bob--x Alice: I am good thanks!
    Bob-x John: I am good thanks!
    Note right of John: Bob thinks a long<br/>long time, so long<br/>that the text does<br/>not fit on a row.

    Bob-->Alice: Checking with John...
    Alice->John: Yes... John, how are you?
sequenceDiagram Alice ->> Bob: Hello Bob, how are you? Bob-->>John: How about you John? Bob--x Alice: I am good thanks! Bob-x John: I am good thanks! Note right of John: Bob thinks a long<br/>long time, so long<br/>that the text does<br/>not fit on a row. Bob-->Alice: Checking with John... Alice->John: Yes... John, how are you?

Basic flowchart

graph LR
    A[Square Rect] -- Link text --> B((Circle))
    A --> C(Round Rect)
    B --> D{Rhombus}
    C --> D
graph LR A[Square Rect] -- Link text --> B((Circle)) A --> C(Round Rect) B --> D{Rhombus} C --> D

Larger flowchart with some styling

graph TB
    sq[Square shape] --> ci((Circle shape))

    subgraph A
        od>Odd shape]-- Two line<br/>edge comment --> ro
        di{Diamond with <br/> line break} -.-> ro(Rounded<br>square<br>shape)
        di==>ro2(Rounded square shape)
    end

    %% Notice that no text in shape are added here instead that is appended further down
    e --> od3>Really long text with linebreak<br>in an Odd shape]

    %% Comments after double percent signs
    e((Inner / circle<br>and some odd <br>special characters)) --> f(,.?!+-*ز)

    cyr[Cyrillic]-->cyr2((Circle shape Начало));

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

Loops, alt and opt

sequenceDiagram
    loop Daily query
        Alice->>Bob: Hello Bob, how are you?
        alt is sick
            Bob->>Alice: Not so good :(
        else is well
            Bob->>Alice: Feeling fresh like a daisy
        end

        opt Extra response
            Bob->>Alice: Thanks for asking
        end
    end
sequenceDiagram loop Daily query Alice->>Bob: Hello Bob, how are you? alt is sick Bob->>Alice: Not so good :( else is well Bob->>Alice: Feeling fresh like a daisy end opt Extra response Bob->>Alice: Thanks for asking end end

Message to self in loop

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!
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!