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15.4 kBMarkdownView Raw
1# mermaid [![Build Status](https://travis-ci.org/mermaid-js/mermaid.svg?branch=master)](https://travis-ci.org/mermaid-js/mermaid) [![NPM](https://img.shields.io/npm/v/mermaid)](https://www.npmjs.com/package/mermaid) [![Coverage Status](https://coveralls.io/repos/github/mermaid-js/mermaid/badge.svg?branch=master)](https://coveralls.io/github/mermaid-js/mermaid?branch=master) [![Join our Slack!](https://img.shields.io/static/v1?message=join%20chat&color=9cf&logo=slack&label=slack)](https://join.slack.com/t/mermaid-talk/shared_invite/enQtNzc4NDIyNzk4OTAyLWVhYjQxOTI2OTg4YmE1ZmJkY2Y4MTU3ODliYmIwOTY3NDJlYjA0YjIyZTdkMDMyZTUwOGI0NjEzYmEwODcwOTE) [![This project is using Percy.io for visual regression testing.](https://percy.io/static/images/percy-badge.svg)](https://percy.io/Mermaid/mermaid)
2
3[English](./README.md) | 简体中文
4
5![banner](./img/header.png)
6
7:trophy: **Mermaid 被提名并获得了 [JS Open Source Awards (2019)](https://osawards.com/javascript/2019) 的 "The most exciting use of technology" 奖项!!!**
8
9**感谢所有参与进来提交 PR,解答疑问的人们! 🙏**
10
11<a href="https://mermaid-js.github.io/mermaid/landing/" alt="Link to landing page for the book The Official Guide To mermaid.js"><img src="https://github.com/mermaid-js/mermaid/blob/master/docs/img/book-banner-pre-release.jpg"></a>
12
13## 关于 Mermaid
14
15<!-- <Main description> -->
16Mermaid 是一个基于 Javascript 的图表绘制工具,通过解析类 Markdown 的文本语法来实现图表的创建和动态修改。Mermaid 诞生的主要目的是让文档的更新能够及时跟上开发进度。
17
18> Mermaid 致力于解决 Doc-Rot 这个令人头疼的问题。
19
20绘图和编写文档花费了开发者宝贵的开发时间,而且随着业务的变更,它很快就会过期。 但是如果缺少了图表或文档,对于生产力和团队新人的业务学习都会产生巨大的阻碍。 <br/>
21Mermaid 通过减少创建可修改的图表所需要的时间、精力和工具来解决这一难题,从而提高了内容的智能化和可重用性。 作为一个基于文本的绘图工具, Mermaid 天生就易于维护和更新,它也可以作为生产脚本(或其他代码)的一部分,使得文档编写变得更加简单。 有了它之后,开发者可以从维护文档这个与开发割离且麻烦的任务中解放出来。 <br/>
22即使是从未接触过编程的非专业人员也可以通过 [Mermaid Live Editor](https://mermaid-js.github.io/mermaid-live-editor/)来创建图表。<br/>
23你可以访问 [教程](./docs/Tutorials.md) 来查看 Live Editor 的视频教程。
24U也可以查看 [Mermaid 的集成和使用](./docs/integrations.md) 这个清单来检查你的文档工具是否已经集成了 Mermaid 支持。
25
26如果想要查看关于 Mermaid 更详细的介绍及基础使用方式,可以查看如果想要查看关于 Mermaid 更详细的介绍及基础使用方式,可以查看 [入门指引](./docs/n00b-overview.md) and [用法](./docs/usage.md).
27
28🌐 [CDN](https://unpkg.com/mermaid/) | 📖 [文档](https://mermaidjs.github.io) | 🙌 [贡献](https://github.com/mermaid-js/mermaid/blob/develop/CONTRIBUTING.md) | 📜 [更新日志](./docs/CHANGELOG.md)
29
30<!-- </Main description> -->
31
32## 示例
33
34__下面是一些使用 Mermaid 和类 Markdown 语法创建的图表示例。点击[语法](https://mermaid-js.github.io/mermaid/#/n00b-syntaxReference) 查看详情__
35<table>
36<!-- <Flowchart> -->
37<tr><td colspan=2 align="center">
38 <b>流程图</b></br>
39 [<a href="http://mermaid-js.github.io/mermaid/#/flowchart">文档</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiZ3JhcGggVERcbiAgICBBW0hhcmRdIC0tPnxUZXh0fCBCKFJvdW5kKVxuICAgIEIgLS0-IEN7RGVjaXNpb259XG4gICAgQyAtLT58T25lfCBEW1Jlc3VsdCAxXVxuICAgIEMgLS0-fFR3b3wgRVtSZXN1bHQgMl0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9fQ">live editor</a>]
40</td></tr>
41<tr>
42 <td><pre>
43graph TD
44A[Hard] -->|Text| B(Round)
45B --> C{Decision}
46C -->|One| D[Result 1]
47C -->|Two| E[Result 2]
48 </pre></td>
49 <td align="center">
50 <img src="https://raw.githubusercontent.com/mermaid-js/mermaid/master/img/gray-flow.png" />
51 </td>
52</tr>
53<!-- </Flowchart> -->
54<!-- <Sequence> -->
55<tr><td colspan=2 align="center">
56 <b>时序图</b><br />
57 [<a href="http://mermaid-js.github.io/mermaid/#/sequenceDiagram">文档</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoic2VxdWVuY2VEaWFncmFtXG5BbGljZS0-PkpvaG46IEhlbGxvIEpvaG4sIGhvdyBhcmUgeW91P1xubG9vcCBIZWFsdGhjaGVja1xuICAgIEpvaG4tPj5Kb2huOiBGaWdodCBhZ2FpbnN0IGh5cG9jaG9uZHJpYVxuZW5kXG5Ob3RlIHJpZ2h0IG9mIEpvaG46IFJhdGlvbmFsIHRob3VnaHRzIVxuSm9obi0tPj5BbGljZTogR3JlYXQhXG5Kb2huLT4-Qm9iOiBIb3cgYWJvdXQgeW91P1xuQm9iLS0-PkpvaG46IEpvbGx5IGdvb2QhIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
58</td></tr>
59<tr>
60 <td><pre>
61sequenceDiagram
62Alice->>John: Hello John, how are you?
63loop Healthcheck
64 John->>John: Fight against hypochondria
65end
66Note right of John: Rational thoughts!
67John-->>Alice: Great!
68John->>Bob: How about you?
69Bob-->>John: Jolly good!
70 </pre></td>
71 <td align="center">
72 <img src="https://raw.githubusercontent.com/mermaid-js/mermaid/master/img/gray-sequence.png" />
73 </td>
74</tr>
75<!-- </Sequence> -->
76<!-- <Gantt> -->
77<tr><td colspan=2 align="center">
78 <b>甘特图</b><br />
79 [<a href="http://mermaid-js.github.io/mermaid/#/gantt">文档</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiZ2FudHRcbnNlY3Rpb24gU2VjdGlvblxuQ29tcGxldGVkIDpkb25lLCAgICBkZXMxLCAyMDE0LTAxLTA2LDIwMTQtMDEtMDhcbkFjdGl2ZSAgICAgICAgOmFjdGl2ZSwgIGRlczIsIDIwMTQtMDEtMDcsIDNkXG5QYXJhbGxlbCAxICAgOiAgICAgICAgIGRlczMsIGFmdGVyIGRlczEsIDFkXG5QYXJhbGxlbCAyICAgOiAgICAgICAgIGRlczQsIGFmdGVyIGRlczEsIDFkXG5QYXJhbGxlbCAzICAgOiAgICAgICAgIGRlczUsIGFmdGVyIGRlczMsIDFkXG5QYXJhbGxlbCA0ICAgOiAgICAgICAgIGRlczYsIGFmdGVyIGRlczQsIDFkIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
80</td></tr>
81<tr>
82 <td><pre>
83gantt
84section Section
85Completed :done, des1, 2014-01-06,2014-01-08
86Active :active, des2, 2014-01-07, 3d
87Parallel 1 : des3, after des1, 1d
88Parallel 2 : des4, after des1, 1d
89Parallel 3 : des5, after des3, 1d
90Parallel 4 : des6, after des4, 1d
91 </pre></td>
92 <td align="center">
93 <img src="https://raw.githubusercontent.com/mermaid-js/mermaid/master/img/gray-gantt.png" />
94 </td>
95</tr>
96<!-- </Gantt> -->
97<!-- <Class> -->
98<tr><td colspan=2 align="center">
99 <b>类图</b><br />
100 [<a href="http://mermaid-js.github.io/mermaid/#/classDiagram">文档</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiY2xhc3NEaWFncmFtXG5DbGFzczAxIDx8LS0gQXZlcnlMb25nQ2xhc3MgOiBDb29sXG48PGludGVyZmFjZT4-IENsYXNzMDFcbkNsYXNzMDkgLS0-IEMyIDogV2hlcmUgYW0gaT9cbkNsYXNzMDkgLS0qIEMzXG5DbGFzczA5IC0tfD4gQ2xhc3MwN1xuQ2xhc3MwNyA6IGVxdWFscygpXG5DbGFzczA3IDogT2JqZWN0W10gZWxlbWVudERhdGFcbkNsYXNzMDEgOiBzaXplKClcbkNsYXNzMDEgOiBpbnQgY2hpbXBcbkNsYXNzMDEgOiBpbnQgZ29yaWxsYVxuY2xhc3MgQ2xhc3MxMCB7XG4gID4-c2VydmljZT4-XG4gIGludCBpZFxuICBzaXplKClcbn0iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9fQ">live editor</a>]
101</td></tr>
102<tr>
103 <td><pre>
104classDiagram
105Class01 &lt;|-- AveryLongClass : Cool
106&lt;&lt;interface>> Class01
107Class09 --> C2 : Where am i?
108Class09 --* C3
109Class09 --|> Class07
110Class07 : equals()
111Class07 : Object[] elementData
112Class01 : size()
113Class01 : int chimp
114Class01 : int gorilla
115class Class10 {
116 &lt;&lt;service>>
117 int id
118 size()
119}
120</pre></td>
121 <td align="center">
122 <img src="https://raw.githubusercontent.com/mermaid-js/mermaid/master/img/gray-class.png" />
123 </td>
124</tr>
125<!-- </Class> -->
126<!-- <State> -->
127<tr><td colspan=2 align="center">
128 <b>状态图</b><br />
129 [<a href="http://mermaid-js.github.io/mermaid/#/stateDiagram">文档</a> - <a href="https://mermaid-js.github.io/mermaid-live-editor/#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">live editor</a>]
130</td></tr>
131<tr>
132 <td><pre>
133stateDiagram-v2
134[*] --> Still
135Still --> [*]
136Still --> Moving
137Moving --> Still
138Moving --> Crash
139Crash --> [*]
140</pre></td>
141 <td align="center">
142 <img src="https://raw.githubusercontent.com/mermaid-js/mermaid/master/img/gray-state.png" />
143 </td>
144</tr>
145<!-- </State> -->
146<!-- <Pie> -->
147<tr><td colspan=2 align="center">
148 <b>饼图</b><br />
149 [<a href="http://mermaid-js.github.io/mermaid/#/pie">文档</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoicGllXG5cIkRvZ3NcIiA6IDQyLjk2XG5cIkNhdHNcIiA6IDUwLjA1XG5cIlJhdHNcIiA6IDEwLjAxIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
150</td></tr>
151<tr>
152 <td><pre>
153pie
154"Dogs" : 386
155"Cats" : 85
156"Rats" : 15
157</pre></td>
158 <td align="center">
159 <img src="https://raw.githubusercontent.com/mermaid-js/mermaid/master/img/gray-pie.png" />
160 </td>
161</tr>
162<!-- </Pie> -->
163<!-- <Git> -->
164<tr><td colspan=2 align="center">
165 <b>Git图</b><br />
166 [实验特性 - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoiZ2l0R3JhcGg6XG5vcHRpb25zXG57XG4gICAgXCJub2RlU3BhY2luZ1wiOiAxNTAsXG4gICAgXCJub2RlUmFkaXVzXCI6IDEwXG59XG5lbmRcbmNvbW1pdFxuYnJhbmNoIG5ld2JyYW5jaFxuY2hlY2tvdXQgbmV3YnJhbmNoXG5jb21taXRcbmNvbW1pdFxuY2hlY2tvdXQgbWFzdGVyXG5jb21taXRcbmNvbW1pdFxubWVyZ2UgbmV3YnJhbmNoXG4iLCJtZXJtYWlkIjp7InRoZW1lIjoiZGVmYXVsdCJ9fQ">live editor</a>]
167</td></tr>
168<tr>
169 <td colspan="2" align="center"><i>敬请期待!</i></td>
170</tr>
171<!-- </Git> -->
172<!-- <Journey> -->
173<tr><td colspan=2 align="center">
174 <b>用户体验旅程图</b><br />
175 [<a href="http://mermaid-js.github.io/mermaid/#/user-journey">文档</a> - <a href="https://mermaidjs.github.io/mermaid-live-editor/#/edit/eyJjb2RlIjoic3RhdGVEaWFncmFtXG4gICAgWypdIC0tPiBTdGlsbFxuICAgIFN0aWxsIC0tPiBbKl1cbiAgICBTdGlsbCAtLT4gTW92aW5nXG4gICAgTW92aW5nIC0tPiBTdGlsbFxuICAgIE1vdmluZyAtLT4gQ3Jhc2hcbiAgICBDcmFzaCAtLT4gWypdIiwibWVybWFpZCI6eyJ0aGVtZSI6ImRlZmF1bHQifX0">live editor</a>]
176</td></tr>
177<tr>
178 <td>
179 <pre>
180 journey
181 title My working day
182 section Go to work
183 Make tea: 5: Me
184 Go upstairs: 3: Me
185 Do work: 1: Me, Cat
186 section Go home
187 Go downstairs: 5: Me
188 Sit down: 3: Me
189</pre></td>
190 <td align="center">
191 <img alt="User Journey Diagram" src="img/gray-user-journey.png" />
192 </td>
193</tr>
194<!-- </Journey> -->
195
196</table>
197
198## 相关项目
199
200- [Command Line Interface](https://github.com/mermaid-js/mermaid-cli)
201- [Live Editor](https://github.com/mermaid-js/mermaid-live-editor)
202- [HTTP Server](https://github.com/TomWright/mermaid-server)
203
204## 贡献者 [![Help wanted](https://img.shields.io/github/labels/mermaid-js/mermaid/Help%20wanted!)](https://github.com/mermaid-js/mermaid/issues?q=is%3Aissue+is%3Aopen+label%3A%22Help+wanted%21%22) [![Contributors](https://img.shields.io/github/contributors/mermaid-js/mermaid)](https://github.com/mermaid-js/mermaid/graphs/contributors) [![Commits](https://img.shields.io/github/commit-activity/m/mermaid-js/mermaid)](https://github.com/mermaid-js/mermaid/graphs/contributors)
205
206Mermaid 是一个不断发展中的社区,并且还在接收新的贡献者。有很多不同的方式可以参与进来,而且我们还在寻找额外的帮助。如果你想知道如何开始贡献,请查看 [这个 issue](https://github.com/mermaid-js/mermaid/issues/866)。
207
208关于如何贡献的详细信息可以在 [贡献指南](CONTRIBUTING.md) 中找到。
209
210## 鸣谢
211来自 Knut Sveidqvist:
212>*特别感谢 [d3](http://d3js.org/) 和 [dagre-d3](https://github.com/cpettitt/dagre-d3) 这两个优秀的项目,它们提供了图形布局和绘图工具库! *
213>*同样感谢 [js-sequence-diagram](http://bramp.github.io/js-sequence-diagrams) 提供了时序图语法的使用。 感谢 Jessica Peter 提供了甘特图渲染的灵感。*
214>*感谢 [Tyler Long](https://github.com/tylerlong) 从 2017年四月开始成为了项目的合作者。*
215>
216>*感谢越来越多的 [贡献者们](https://github.com/knsv/mermaid/graphs/contributors),没有你们,就没有这个项目的今天!*
217
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219
220*Mermaid 是由 Knut Sveidqvist 创建,它为了更简单的文档编写而生。*