Demos

Basic flowchart

%% Example diagram
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

%% Code for flowchart below
graph TB
    sq[Square shape] -- ci((Circle shape))

    subgraph A subgraph
        odOdd shape]-- Two linelt;bredge comment -- ro
        di{Diamond with lt;br/ line break} -.- ro(Roundedlt;brsquarelt;brshape)
        di==ro2(Rounded square shape)
    end

    %% Notice that no text in shape are added here instead that is appended further down
    e -- od3Really long text with linebreaklt;brin an Odd shape]

    %% Comments after double percent signs
    e((Inner / circlelt;brand some odd lt;brspecial 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 subgraph 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
in an Odd shape] %% Comments after double percent signs e((Inner / circle
and some odd
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

Basic sequence diagram

%% Sequence diagram code
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 longlt;br/long time, so longlt;br/that the text doeslt;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
long time, so long
that the text does
not fit on a row. Bob-->Alice: Checking with John... Alice->John: Yes... John, how are you?

Loops, alt and opt

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

        opt Extra response
            Bob-gt;gt;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

%% Sequence diagram code
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 thoughtslt;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
prevail... John-->>Alice: Great! John->>Bob: How about you? Bob-->>John: Jolly good!