React Flow 11 Release

A lot has happened since we published our last blog post six months ago. We got our first pro subscribers, we hired John who helps us with the docs, communication and community and we are all working full time on React Flow 🥳. Today we are releasing a new major version with lots of new features and very few breaking changes (unlike the last major update..).

If you are looking for the information how to upgrade, please refer to the "Migrate to v11" guide (opens in a new tab).

TLDR;

• React Flow has a new package name -> reactflow
• Better accessibilty by default (keyboard controls, aria- defaults)
• Cleaner edge routing for smoothstep and step edges
• Better selectable edges with a new interactionWidth option
• New hooks: useNodesInitialized, useOnViewportChange and useOnSelectionChange

🎉 A New Package Name

The biggest change, is that we got a new package name! A very nice person gave us the reactflow npm package (opens in a new tab) name and we also got the @reactflow organization (opens in a new tab). So from now on, you can install React Flow via:

npm install reactflow

and then use it as before:

import ReactFlow, { Controls, Background } from 'reactflow';
import 'reactflow/dist/style.css';
 
...
 
<ReactFlow nodes={nodes} edges={edges}>
  <Controls />
  <Background />
</ReactFlow>

Looks nice, right? Under the hood we are publishing packages separately in the @reactflow organization. These packages are used by the main reactflow package and also can be used separately (opens in a new tab). For this we've rebuilt React Flow to a monorepo powered by turborepo (opens in a new tab), Rollup (opens in a new tab) and Vite (opens in a new tab).

✨ New Features

For this release, we focused on accessibility (nothing better for a v11 release than a11y!) and edges, with some other smaller updates and stability fixes along the way.

Accessibility

Accessibility was quite limited in the previous versions and we put a lot of work into it to make it better by default. You can now interact with a flow with your keyboard. You can focus nodes and edges with Tab, select an element with Enter and move nodes around with the arrow keys.

Moreover we added default aria-labels to all elements on the pane and made them configurable with new ariaLabel options for nodes and edges. You can refer to the new Accessibility guide (opens in a new tab) for more information.

Edge Routing and Edge Selection

Whereas in v10, the nodes were a bit more in the spotlight, this time we've put a special focus on the edges. A lot of people complained that thin edges are hard to select. We've fixed that by introducing a new interactionWidth edge option (opens in a new tab). Its default value is 20, meaning that a 20px wide invisible edge gets painted below the visible edge for an easier interaction.

Another big update is a complete rewrite of the edge routing for smoothstep and step edge types.

That's not all. We also revised the edge update behaviour (opens in a new tab), added pathOptions (opens in a new tab) for default and smoothstep edges and a new deletable flag. For making it easier to develop custom edges we are exporting a <BaseEdge /> component (opens in a new tab) that can draw the invisible helper edge and the label for you.

Node Positioning

To make layouting easier, we've added a new prop called nodeOrigin (opens in a new tab). The origin was always in the top left, meaning that you need to subtract half the width and height to center a node. Now you can set nodeOrigin={[0.5, 0.5]} to set the origin to the center or nodeOrigin={[1, 1]} to set it to the bottom right.

Furthermore we've implemented a useNodesInitialized hook (opens in a new tab). It returns a boolean that can be used to determine if all nodes are initialized and a new layout should be done, for example. Another small change is that you can pan over a node when it's not draggable which makes it easier to navigate bigger flows.

New Hooks

In the future we want to get rid of some <ReactFlow /> component props (there are 140+ 😵‍💫). One idea is to replace some props through hooks. With this release we are adding the useOnViewportChange (opens in a new tab) and the useOnSelectionChange (opens in a new tab) hook. Before this release you could only listen to a viewport change by using onMoveStart, onMove and onMoveEnd. With the new useOnViewportChange hook, you can easily listen to changes in every component.

Miscellaneous

The background got a new variant cross (opens in a new tab), and you can control the gap size horizontally and vertically individually for all variants. We've added new handlers that make it easier to add mouse event handlers to the pane (the area below the nodes): onPaneMouseEnter, onPaneMouseMove and onPaneMouseLeave (opens in a new tab). Last but not least the cursor is a grabbing hand while dragging the pane or a node and you pan over nodes when they are not draggable. Strange that this wasn't always the case?!

What's Next?

React Flow is not just the library. It's the website with the docs and the examples, the pro platform and also the community on Github and Discord! In the upcoming weeks and months we want to make the onboarding for developers and especially beginner developers easier. For that we are working on an in-depth getting started guide and easier to understand docs in general. We are also rebrushing the pro platform so that you can get more out of the pro examples.

Thanks for being a part of the React Flow community, and happy coding! ✌🏻