[](http://js.org)
npm install flowchart.js
flowchart.js is a flowchart DSL and SVG render that runs in the browser and terminal.
Nodes and connections are defined separately so that nodes can be reused and connections can be quickly changed.
Fine grain changes to node and connection style can also be made right in the DSL.
``flowchart
st=>start: Start:>http://www.google.com[blank]
e=>end:>http://www.google.com
getInfo=>input: Input Info
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: Yes
or No?:>http://www.google.com
io=>inputoutput: catch something...
printInfo=>output: Print info
para=>parallel: parallel tasks
st->getInfo->op1->cond
cond(yes)->io->printInfo->e
cond(no)->para
para(path1, bottom)->sub1(right)->op1
para(path2, top)->op1
`
flowchart.js is on CDNJS, feel free to use it.
You will also need Raphaël, which is also on CDNJS.
The demo html page is at example/index.html.
Items in
[] are optional._nodeName_ defines the nodes variable name within the flowchart document.
_nodeType_ defines what type the node is. See Node Types for more information.
_nodeText_ is the text that will be inserted into the node. Newlines are allowed and will be reflected in the rendered node text.
_flowstate_ is optional and uses the
| operator that specifies extra styling for the node._urlLink_ is optional and uses the
:> operator to specify the url to link to.Node Types
Defines the shape that the node will take.$3
Used as the first node where flows start from.
Default text is Start.`flowchart
st=>start: start
`$3
Used as the last node where a flow ends.
Default text is End.`flowchart
e=>end: end
`$3
Indicates that an operation needs to happen in the flow.`flowchart
op1=>operation: operation
`$3
Indicates that IO happens in a flow.`flowchart
io=>inputoutput: inputoutput
`$3
Indicates that Input happens in a flow.`flowchart
getInfo=>input: Input info
`$3
Indicates that Output happens in a flow.`flowchart
printInfo=>output: Print info
`$3
Indicates that a subroutine happens in the flow and that there should be another flowchart that documents this subroutine.`flowchart
sub1=>subroutine: subroutine
`$3
Allows for a conditional or logical statement to direct the flow into one of two paths.`flowchart
cond=>condition: condition
Yes or No?
`$3
Allows for multiple flows to happen simultaneously.`flowchart
para=>parallel: parallel
`Connections
Connections are defined in their own section below the node definitions.
The -> operator specifies a connection from one node to another like nodeVar1->nodeVar2->nodeVar3.Not all nodes need to be specified in one string and can be separaged like so
`flowchart
nodeVar1->nodeVar2
nodeVar2->nodeVar3
`Connection syntax is as follows:
Items in
[] are optional.$3
The following directions are available and define the direction the connection will leave the node from. If there are more than one specifiers, it is always the last. All nodes have a default direction making this an optional specification. will be used to indicate that one of the following should be used in its place.* left
* right
* top
* bottom
$3
Each node variables has optional specifiers, like direction, and some have special specifiers depending on the node type that are defined below. Specifiers are added after the variable name in () and separated with , like nodeVar(spec1, spec2).$3
Optional directionstartVar($3
No specifications because connections only go to the end node and do not leave from it.previousNode->endVar$3
Optional directionoperationVar($3
Optional directioninputoutputVar($3
Optional directionsubroutineVar($3
Required logical specification of yes or noOptional direction
`flowchart
conditionalVar(yes, )->nextNode1
conditionalVar(no, )->nextNode2
`$3
Required path specification of path1, path2, or path3Optional direction
`flowchart
parallelVar(path1, )->nextNode1
parallelVar(path2, )->nextNode2
parallelVar(path3, )->nextNode3
`Links
A external link can be added to a node with the :> operator.The
st node is linked to http://www.google.com and will open a new tab because [blank] is at the end of the URL.The
e node is linked to http://www.yahoo.com and will cause the page to navigate to that page instead of opening a new tab.`flowchart
st=>start: Start:>http://www.google.com[blank]
e=>end: End:>http://www.yahoo.com
`Advice
Symbols that should possibly not be used in the text: => and -> and :> and | and @> and :$If you want to emphasize a specific path in your flowchart, you can additionally define it like this:
`
st@>op1({"stroke":"Red"})@>cond({"stroke":"Red","stroke-width":6,"arrow-end":"classic-wide-long"})@>c2({"stroke":"Red"})@>op2({"stroke":"Red"})@>e({"stroke":"Red"})
`Custom names for branches
`
st=>start: Start:>http://www.google.com[blank]
e=>end:>http://www.google.com
op1=>operation: My Operation
sub1=>subroutine: My Subroutine
cond=>condition: linear or polynomial :>http://www.google.com
io=>inputoutput: catch something...
para=>parallel: 3 possibilitiesst->op1->cond
cond(true@linear)->io->e
cond(false@polynomial)->sub1(right)
sub1(right)->para
para(path1@an1, top)->cond
para(path2@an2, right)->op1
para(path3@an3, bottom)->e
``via GitHub
Many thanks to js-sequence-diagrams which greatly inspired this project, and forms the basis for the syntax.