WebComponentFlow is a lightweight, minimal-dependency flowboard library built with VanJS. It lets you add draggable nodes and connect them with edges in any HTML page via a simple global factory.
- Add, remove, and connect nodes programmatically
- Zoom and pan the board with keyboard modifiers
- Dark mode support via CSS class toggle
- Bundled with VanJS so consumers don’t need separate dependencies
- Bundled with default CSS so consumers do not need to style themselves
- UMD build for easy inclusion via CDN or npm
npm install @leanacht/webcomponent-flow<script src="https://unpkg.com/@leanacht/webcomponent-flow/dist/flow-app.umd.js"></script><body>
<div id="board" style="width:100%; height:100vh"></div>
<script>
// Initialize the board
const flow = WebComponentFlow({
container: '#board',
darkMode: false
});
// Add a new node with 2 inputs, 1 output
flow.addNode(2, 1);
</script>
</body>Creates and mounts a new flow board.
| Option | Type | Default | Description |
|---|---|---|---|
container |
String or HTMLElement | document.body |
Selector or element to mount into |
darkMode |
Boolean | false |
Whether to start in dark mode |
Returns an object with methods:
addNode(numInputs, numOutputs)— Add a node.removeNode()— Remove the selected node.addEdge(nodeOutput, nodeInput)— (Internal) Commit a draft edge.removeEdge()— Remove the selected edge.undo()— Undo last action.redo()— Redo last undone action.
Toggle dark mode by adding/removing the dark class on <html> or <body>. The library exposes toggleDarkMode() if needed.
Clone the repo, install dependencies, and run:
nom install
npm run dev # serve locally
npm run build # produce dist/*- Fork the repo
- Create a feature branch
- Open a pull request
MIT © leanacht