[![JS.ORG](https://img.shields.io/badge/js.org-flowchart-ffb400.svg?style=flat-square)](http://js.org) # [flowchart.js](http://flowchart.js.org) flowchart.js is a flowchart DSL and SVG render that runs in the browser and [terminal](https://github.com/francoislaberge/diagrams/#flowchart). 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. ## Example ```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 ``` ![Example Flowchart](/imgs/example.svg) ## CLI See [francoislaberge/diagrams](https://github.com/francoislaberge/diagrams/#flowchart) on how to flowchart.js in the terminal. ## Browser Usage flowchart.js is on [CDNJS](https://cdnjs.com/libraries/flowchart), feel free to use it. You will also need [Raphaël](http://www.raphaeljs.com/), which is also on [CDNJS](https://cdnjs.cloudflare.com/ajax/libs/raphael/2.3.0/raphael.min.js). The demo html page is at [example/index.html](example/index.html). ## Node Syntax `nodeName=>nodeType: nodeText[|flowstate][:>urlLink]` 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. ### start Used as the first node where flows start from. Default text is `Start`. ![start image](imgs/start.png "start image") ```flowchart st=>start: start ``` ### end Used as the last node where a flow ends. Default text is `End`. ![end image](imgs/end.png "end image") ```flowchart e=>end: end ``` ### operation Indicates that an operation needs to happen in the flow. ![operation image](imgs/operation.png "operation image") ```flowchart op1=>operation: operation ``` ### inputoutput Indicates that IO happens in a flow. ![inputoutput image](imgs/inputoutput.png "inputoutput image") ```flowchart io=>inputoutput: inputoutput ``` ### input Indicates that Input happens in a flow. ![input image](imgs/input.png "input image") ```flowchart getInfo=>input: Input info ``` ### output Indicates that Output happens in a flow. ![output image](imgs/output.png "output image") ```flowchart printInfo=>output: Print info ``` ### subroutine Indicates that a subroutine happens in the flow and that there should be another flowchart that documents this subroutine. ![subroutine image](imgs/subroutine.png "subroutine image") ```flowchart sub1=>subroutine: subroutine ``` ### condition Allows for a conditional or logical statement to direct the flow into one of two paths. ![condition image](imgs/condition.png "condition image") ```flowchart cond=>condition: condition Yes or No? ``` ### parallel Allows for multiple flows to happen simultaneously. ![parallel image](imgs/parallel.png "parallel image") ```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. ### Directions 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 ### Node Specific Specifiers by Type 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)`. ### start Optional direction `startVar()->nextNode` ### end No specifications because connections only go to the end node and do not leave from it. `previousNode->endVar` ### operation Optional direction `operationVar()->nextNode` ### inputoutput Optional direction `inputoutputVar()->nextNode` ### subroutine Optional direction `subroutineVar()->nextNode` ### condition Required logical specification of `yes` or `no` Optional direction ```flowchart conditionalVar(yes, )->nextNode1 conditionalVar(no, )->nextNode2 ``` ### parallel Required path specification of `path1`, `path2`, or `path3` Optional 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 possibilities st->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 ```

Demonstration

![img](https://user-images.githubusercontent.com/1086194/137810516-0d7d7307-fc55-466f-b06d-a6ca9f6b8785.png)

## Contributors via [GitHub](https://github.com/adrai/flowchart.js/graphs/contributors) ## Thanks Many thanks to [js-sequence-diagrams](http://bramp.github.io/js-sequence-diagrams/) which greatly inspired this project, and forms the basis for the syntax.

	Stars	Issues	Version	Updated	Created
cytoscape			3.29.2	14 days ago	12 years ago
diagram-js			14.5.3	21 hours ago	10 years ago
flowchart.js	8,457	104	1.18.0	5 months ago	8 years ago
jsplumb	7,714	0	2.15.6	3 years ago	9 years ago
mermaid	67,253	937	10.9.0	2 months ago	9 years ago
mxgraph	6,748	0	4.2.2	4 years ago	7 years ago

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