xyflow/packages/svelte

Svelte Flow (alpha)

Svelte Flow is a highly customizable component for building interactive graphs and node-based editors, built by the creators of React Flow. This package is currently under heavy development and the API is very likely to change.

Installation

The easiest way to get the latest version of Svelte Flow is to install it via npm, yarn or pnpm:

npm install @xyflow/svelte

What is “xyflow”? Learn more here.

Getting started

We are working on a new website and everything so there are no docs for Svelte Flow yet. Everything is typed, so your IDE should help you a bit and you can also the React Flow docs because the API is very similar. You can also check out the Svelte Flow examples in this repo. If you want to start right away you can check out the Svelte Flow examples Stackblitz project.

A basic flow looks like this:

<script lang="ts">
  import { writable } from 'svelte/store';
  import {
    SvelteFlow,
    Controls,
    Background,
    BackgroundVariant,
    MiniMap,
  } from '@xyflow/svelte';

  // you need to import the styles for Svelte Flow to work
  // if you just want to load the basic styleds, you can import '@xyflow/svelte/dist/base.css'
  import '@xyflow/svelte/dist/style.css'
  
  // We are using writables for the nodes and edges to sync them easily. When a user drags a node for example, Svelte Flow updates its position.
  // This also makes it easier to update nodes in user land.
  const nodes = writable([
    {
      id: '1',
      type: 'input',
      data: { label: 'Input Node' },
      position: { x: 0, y: 0 }
    },
    {
      id: '2',
      type: 'custom',
      data: { label: 'Node' },
      position: { x: 0, y: 150 }
    }
  ]);

  // same for edges
  const edges = writable([
    {
      id: '1-2',
      type: 'default',
      source: '1',
      target: '2',
      label: 'Edge Text'
    }
  ]);
</script>

<SvelteFlow
  {nodes}
  {edges}
  fitView
  on:nodeclick={(event) => console.log('on node click', event)}
>
  <Controls />
  <Background variant={BackgroundVariant.Dots} />
  <MiniMap />
</SvelteFlow>

How to Contribute

Show us what you make: Drop it in into our Discord Server, tweet at us, or email us at info@reactflow.dev

Community Participation: Ask and answer questions in our Discord Server or jump in on Github discussions.

Squash Bugs: We can’t catch them all. Check existing issues and discussions first, then create a new issue to tell us what’s up.

Financial Support: If you are an organization who wants to make sure Svelte Flow continues to be maintained, reach out to us at info@reactflow.dev

And of course, we love Github stars ⭐

Development

If you want to check out the current version you need to run the following command from the root directory:

1. pnpm install - install dependencies
2. pnpm build - needs to be done once
3. pnpm dev - starts dev server

You can now access the examples under http://127.0.0.1:5173

License

Svelte Flow is MIT Licensed.