Connection Line

A Connection Line is what you see when you click and drag out from a handle. It represents a possible edge and can snap to valid handles in close proximity. You can implement your own Connection Line by passing a Svelte component with slot="connectionLine". The useConnection hook gives you access to the current connection.


<script lang="ts">
  import { writable } from 'svelte/store';
  import { SvelteFlow, Background, BackgroundVariant, type Edge, type Node } from '@xyflow/svelte';
 
  import CustomNode from './CustomNode.svelte';
  import ConnectionLine from './ConnectionLine.svelte';
 
  import '@xyflow/svelte/dist/style.css';
 
  const nodeTypes = {
    custom: CustomNode
  };
 
  const nodes = writable<Node[]>([
    {
      id: 'connectionline-1',
      type: 'custom',
      data: { label: 'Node 1' },
      position: { x: 250, y: 5 }
    }
  ]);
 
  const edges = writable<Edge[]>([]);
</script>
 
<div style="height:100vh;">
  <SvelteFlow {nodeTypes} {nodes} {edges} fitView>
    <ConnectionLine slot="connectionLine" />
    <Background variant={BackgroundVariant.Lines} />
  </SvelteFlow>
</div>

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