（原创）大部分md编辑器不支持渲染流程图，目前找到两种合理的方式 实现
方式一
Typora编辑---> 导出成HTML
方式二
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>flowchart.js · Playground</title>
<style type="text/css">
.end-element { fill : #FFCCFF; }
</style>
<script src="http://cdnjs.cloudflare.com/ajax/libs/raphael/2.3.0/raphael.min.js"></script>
<script src="http://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.0/jquery.min.js"></script>
<script src="http://flowchart.js.org/flowchart-latest.js"></script>
<!-- <script src="../release/flowchart.min.js"></script> -->
<script>
window.onload = function () {
var btn = document.getElementById("run"),
cd = document.getElementById("code"),
chart;
(btn.onclick = function () {
var code = cd.value;
if (chart) {
chart.clean();
}
chart = flowchart.parse(code);
chart.drawSVG('canvas', {
// 'x': 30,
// 'y': 50,
'line-width': 3,
'maxWidth': 3,//ensures the flowcharts fits within a certian width
'line-length': 50,
'text-margin': 10,
'font-size': 14,
'font': 'normal',
'font-family': 'Helvetica',
'font-weight': 'normal',
'font-color': 'black',
'line-color': 'black',
'element-color': 'black',
'fill': 'white',
'yes-text': 'yes',
'no-text': 'no',
'arrow-end': 'block',
'scale': 1,
'symbols': {
'start': {
'font-color': 'red',
'element-color': 'green',
'fill': 'yellow'
},
'end':{
'class': 'end-element'
}
},
'flowstate' : {
'past' : { 'fill' : '#CCCCCC', 'font-size' : 12},
'current' : {'fill' : 'yellow', 'font-color' : 'red', 'font-weight' : 'bold'},
'future' : { 'fill' : '#FFFF99'},
'request' : { 'fill' : 'blue'},
'invalid': {'fill' : '#444444'},
'approved' : { 'fill' : '#58C4A3', 'font-size' : 12, 'yes-text' : 'APPROVED', 'no-text' : 'n/a' },
'rejected' : { 'fill' : '#C45879', 'font-size' : 12, 'yes-text' : 'n/a', 'no-text' : 'REJECTED' }
}
});
$('[id^=sub1]').click(function(){
alert('info here');
});
})();
};
function myFunction(event, node) {
console.log("You just clicked this node:", node);
}
</script>
</head>
<body>
<div><textarea id="code" style="width: 100%;" rows="11">
st=>start: Start|past:>http://www.google.com[blank]
e=>end: End:>http://www.google.com
op1=>operation: My Operation|past:$myFunction
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
para=>parallel: parallel tasks
st->op1(right)->cond
cond(yes, right)->c2
cond(no)->para
c2(true)->io->e
c2(false)->e
para(path1, bottom)->sub1(left)->op1
para(path2, right)->op2->e
st@>op1({"stroke":"Red"})@>cond({"stroke":"Red","stroke-width":6,"arrow-end":"classic-wide-long"})@>c2({"stroke":"Red"})@>op2({"stroke":"Red"})@>e({"stroke":"Red"})</textarea></div>
<div><button id="run" type="button">Run</button></div>
<div id="canvas"></div>
</body>
</html>
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