生成流程图 flowchart.js
代码

```flow
st=>start: User login
op=>operation: Operation
cond=>condition: Successful Yes or No?
e=>end: Into admin

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

st=>start: User login
op=>operation: Operation
cond=>condition: Successful Yes or No?
e=>end: Into admin

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

顺序图表 sequence-diagrams.js

```seq
A->B: Message
B->C: Message
C->A: Message
` ``

A->B: Message
B->C: Message
C->A: Message