Connection Limit

This is an example of a custom node with a custom handle that can limit the amount of connections a handle can have using the isConnectable prop. You can use a boolean, a number (the number of max. connections the handle should have) or a callback function that returns a boolean as an arg for the isConnectable prop of the CustomHandle component.

<script lang="ts">
  import { SvelteFlow, Background, type Node, type Edge } from '@xyflow/svelte';
  import '@xyflow/svelte/dist/style.css';
 
  import { initialNodes, initialEdges } from './nodes-and-edges';
  import CustomNode from './CustomNode.svelte';
 
  let nodes = $state.raw<Node[]>(initialNodes);
  let edges = $state.raw<Edge[]>(initialEdges);
 
  const nodeTypes = {
    custom: CustomNode,
  };
</script>
 
<SvelteFlow bind:nodes bind:edges {nodeTypes} fitView>
  <Background />
</SvelteFlow>

Feature Overview