litegraph.js

js Styles
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.
Version 0.7.18 License MIT
<link href=" https://cdn.jsdelivr.net/npm/litegraph.js@0.7.18/css/litegraph.min.css " rel="stylesheet">
No default CSS file set by the package author so the URL is guessed. You can always browse all package files to use another one.