Forked from nsdont/gitbook-plugin-new-flowchart,to make sure we can add a custom style for the chart,also supports new version of flowchart.js(current version is 1.17.1).

Fox Flowchart Plugin

To use the plugin in your Gitbook project, add the plugin to the book.json file.

{
    "plugins": ["flowchart-fox"]
}

we can add custom style if necessary:

pluginsConfig:{
    'flowchart':{        
        'x': 0,
        'y': 0,
        'width':1,
        'line-width': 1,
        'line-length': 50,
         'text-margin': 10       
    }
}

Then, to include a sequence diagram, just wrap your definition in a "sequence" code block. For example:

``` flow
st=>start: Start|past:>http://www.google.com[blank]
e=>end: End:>http://www.google.com
op1=>operation: My Operation|past
op2=>operation: Stuff|current
sub1=>subroutine: My Subroutine|invalid
cond=>condition: Yes
or No?|approved:>http://www.google.com
c2=>condition: Good idea|rejected
io=>inputoutput: catch something...|request

st->op1(right)->cond
cond(yes, right)->c2
cond(no)->sub1(left)->op1
c2(yes)->io->e
c2(no)->op2->e
```

Please reference the flowchart.js documentation for details on syntax.

Below is another example with more configuration items:

'flowchart': {
    "arrow-end": "block",
    "element-color": "black",
    "fill": "white",
    "flowstate": {
        "approved": {
            "fill": "#58C4A3",
            "font-size": 12
        },
        "current": {
            "fill": "#008080",
            "font-color": "white",
            "font-weight": "bold"
        },
        "future": {
            "fill": "#8A624A"
        },
        "success": {
            "fill": "#0B6623",
            "font-color": "white",
            "font-weight": "bold"
        },
        "invalid": {
            "fill": "#6c5696"
        },
        "past": {
            "fill": "#CCCCCC",
            "font-size": 12
        },
        "select": {
            "fill": "#E1AD01",
            "font-size": 12
        },
        "rejected": {
            "fill": "#C45879",
            "font-size": 12
        },
        "request": {
            "fill": "#569656"
        },
        'yellowgreen': {
            "fill": "yellowgreen"
        },
        'failed': {
            "fill": "#800020"
        }
    },
    "font-color": "black",
    "font-size": 14,
    "line-color": "black",
    "line-length": 50,
    "line-width": 1.3,
    "scale": 2,
    "symbols": {
        "end": {
            "class": "end-element",
            "font-color": "white",
            "font-weight": "bold"
        },
        "start": {
            "fill": "#8c2106",
            "font-color": "white",
            "font-weight": "bold"
        }
    },
    "text-margin": 10,
    "width": 1,
    "x": 0,
    "y": 0,
    "yes-text": "是",
    "no-text": "否"
}

example screenshot:

Reference

This project inspiration from gmassanek/gitbook-plugin-js-sequence-diagram,forked from nsdont/gitbook-plugin-new-flowchart