@comfyorg/litegraph
Advanced tools
A graph node editor similar to PD or UDK Blueprints. It works in an HTML5 Canvas and allows to export graphs to be included in applications.
This is the litegraph version used in ComfyUI_frontend.
This repo is litegraph with the following modifications:
npm i @comfyorg/litegraph
A library in Javascript to create graphs in the browser similar to Unreal Blueprints. Nodes can be programmed easily and it includes an editor to construct and tests the graphs.
It can be integrated easily in any existing web applications and graphs can be run without the need of the editor.
Try it in the demo site.
Although it is easy to create new node types, LiteGraph comes with some default nodes that could be useful for many cases:
You can install it using npm
npm install litegraph.js
Or downloading the build/litegraph.js and css/litegraph.css version from this repository.
<html>
<head>
<link rel="stylesheet" type="text/css" href="litegraph.css">
<script type="text/javascript" src="litegraph.js"></script>
</head>
<body style='width:100%; height:100%'>
<canvas id='mycanvas' width='1024' height='720' style='border: 1px solid'></canvas>
<script>
var graph = new LGraph();
var canvas = new LGraphCanvas("#mycanvas", graph);
var node_const = LiteGraph.createNode("basic/const");
node_const.pos = [200,200];
graph.add(node_const);
node_const.setValue(4.5);
var node_watch = LiteGraph.createNode("basic/watch");
node_watch.pos = [700,200];
graph.add(node_watch);
node_const.connect(0, node_watch, 0 );
graph.start()
</script>
</body>
</html>
Here is an example of how to build a node that sums two inputs:
//node constructor class
function MyAddNode()
{
this.addInput("A","number");
this.addInput("B","number");
this.addOutput("A+B","number");
this.properties = { precision: 1 };
}
//name to show
MyAddNode.title = "Sum";
//function to call when the node is executed
MyAddNode.prototype.onExecute = function()
{
var A = this.getInputData(0);
if( A === undefined )
A = 0;
var B = this.getInputData(1);
if( B === undefined )
B = 0;
this.setOutputData( 0, A + B );
}
//register in the system
LiteGraph.registerNodeType("basic/sum", MyAddNode );
or you can wrap an existing function:
function sum(a,b)
{
return a+b;
}
LiteGraph.wrapFunctionAsNode("math/sum",sum, ["Number","Number"],"Number");
It also works server-side using NodeJS although some nodes do not work in server (audio, graphics, input, etc).
var LiteGraph = require("./litegraph.js").LiteGraph;
var graph = new LiteGraph.LGraph();
var node_time = LiteGraph.createNode("basic/time");
graph.add(node_time);
var node_console = LiteGraph.createNode("basic/console");
node_console.mode = LiteGraph.ALWAYS;
graph.add(node_console);
node_time.connect( 0, node_console, 1 );
graph.start()
It includes several commands in the utils folder to generate doc, check errors and build minifyed version.
The demo includes some examples of graphs. In order to try them you can visit demo site or install it on your local computer, to do so you need git, node and npm. Given those dependencies are installed, run the following commands to try it out:
$ git clone https://github.com/jagenjo/litegraph.js.git
$ cd litegraph.js
$ npm install
$ node utils/server.js
Example app listening on port 80!
Open your browser and point it to http://localhost:8000/. You can select a demo from the dropdown at the top of the page.
You can write any feedback to javi.agenjo@gmail.com
FAQs
A graph node editor similar to PD or UDK Blueprints. It works in an HTML5 Canvas and allows to export graphs to be included in applications.
We found that @comfyorg/litegraph demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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