[TOC]

前言

一、序列图（Sequence）

序列图由 js-sequence提供支持，可以将代码块转成序列图

示例如下：

```sequence
Title: Here is a title
A->B: Normal line
B-->C: Dashed line
C->>D: Open arrow
D-->>A: Dashed open arrow

效果如下：

```sequence
Title: Here is a title
A->B: Normal line
B-->C: Dashed line
C->>D: Open arrow
D-->>A: Dashed open arrow

二、流程图（Flowchart）

序列图由flowchart.js提供支持，可以将代码块转成序列图

示例如下：

?```flow
st=>start: Start
op=>operation: Your Operation
cond=>condition: Yes or No?
e=>end

st->op->cond
cond(yes)->e
cond(no)->op
?```

效果如下：

st=>start: Start
op=>operation: Your Operation
cond=>condition: Yes or No?
e=>end

st->op->cond
cond(yes)->e
cond(no)->op

三、Mermaid

Mermaid 支持生成序列图、流程图、甘特图

详细用法参见官方文档 : https://mermaidjs.github.io/

1.Sequence

示例如下：

?```mermaid
%% Example of sequence diagram
  sequenceDiagram
    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
?```

效果如下：

%% Example of sequence diagram
sequenceDiagram
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

2.Flowchart

示例如下：

?```mermaid
graph LR
A[Hard edge] -->B(Round edge)
    B --> C{Decision}
    C -->|One| D[Result one]
    C -->|Two| E[Result two]
?```

效果如下：

graph LR
A[Hard edge] -->B(Round edge)
B --> C{Decision}
C -->|One| D[Result one]
C -->|Two| E[Result two]

3.Gantt

```mermaid
%% Example with selection of syntaxes
        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

        section Documentation
        Describe gantt syntax               :active, a1, after des1, 3d
        Add gantt diagram to demo page      :after a1  , 20h
        Add another diagram to demo page    :doc1, after a1  , 48h

        section Last section
        Describe gantt syntax               :after doc1, 3d
        Add gantt diagram to demo page      : 20h
        Add another diagram to demo page    : 48h
```

效果如下：

%% Example with selection of syntaxes
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

section Documentation
Describe gantt syntax :active, a1, after des1, 3d
Add gantt diagram to demo page :after a1 , 20h
Add another diagram to demo page :doc1, after a1 , 48h

section Last section
Describe gantt syntax :after doc1, 3d
Add gantt diagram to demo page : 20h
Add another diagram to demo page : 48h

参考资料

1. https://support.typora.io/Draw-Diagrams-With-Markdown/
2. https://github.com/adrai/flowchart.js
3. Markdown绘制流程图的方法
4. Markdown中使用mermaid画流程图

原文地址：https://www.cnblogs.com/shirui/p/10763443.html