zustand error

[Jasminou]

Describe the Bug

Hi, on latest. When I try to use useReactFlow as describde in save and restore example on your website. I got this error below: Error Seems like you have not used zustand provider as an ancestor.

let me know if I'm missing something thanks

Your Example Website or App

No response

Steps to Reproduce the Bug or Issue

I followed the save/restore example here: https://reactflow.dev/docs/examples/save-and-restore/ when i try to use useReactFlow() I got this error.

Expected behavior

As User I expect to not have error when using some feature of the lib

Screenshots or Videos

Platform

• OS: [macOS, Linux]
• Browser: [Chrome, Safari, Firefox]
• Version: [latest v10.0.4]

Additional context

No response

[raarts]

Don't know of this is relevant, but I just had the same error after upgrading to 10.0.6. Completely rebuilding the app fixed it.

[moklick]

Is the component where you want to use useReactFlow a child component of <ReactFlow /> or wrapped with the <ReactFlowProvider /> ?

[Jasminou]

@moklick yes it's wrapped with ReactFlowProvider like below

export const myComponent = (props) => {
  const [nodes, setNodes, onNodesChange] = useNodesState(initialNodes);
  const [edges, setEdges, onEdgesChange] = useEdgesState(initialEdges);
  const [rfInstance, setRfInstance] = useState(null);
  const { setViewport } = useReactFlow();  // when I add this I've the error

  const onSave = useCallback(() => {
    if (reactflowInstance) {
      const flow = reactflowInstance.toObject();
      localStorage.setItem(flowKey, JSON.stringify(flow));
    }
  }, [reactflowInstance]);

  // ... 

  const onRestore = useCallback(() => {
    const restoreFlow = async () => {
      const flow = JSON.parse(localStorage.getItem(flowKey));

      if (flow) {
        const { x = 0, y = 0, zoom = 1 } = flow.viewport;
        setNodes(flow.nodes || []);
        setEdges(flow.edges || []);
        setViewport({ x, y, zoom });
      }
    };

    restoreFlow();
  }, [setEdges, setNodes, setViewport]);

   //...

  return (
    <ReactFlowProvider>
      <ReactFlow
        nodes={nodes}
        edges={edges}
        nodeTypes={nodeTypes}
        edgeTypes={edgeTypes}
        onNodeClick={onNodeClick}
        onPaneClick={onPaneClick}
        onInit={onInit}
        onNodesChange={onNodesChange}
        onEdgesChange={onEdgesChange}
        nodesDraggable={false}
        nodesConnectable={false}
        zoomOnScroll={false}
        zoomOnPinch={false}
        zoomOnDoubleClick={false}
        panOnDrag={false}
        minZoom={0.8}
        fitView
      ></ReactFlow>
    </ReactFlowProvider>
  );
};

[moklick]

The component where you are using the hook needs to be wrapped with the ReactFlowProvider. You need to move it one level up.

<ReactFlowProvider>
  <ComponentWhereYouAreUsingTheHook />
</ReactFlowProvider>

[Jasminou]

Ah ok thanks i will try that

[Jasminou]

moving it a level up works thanks again

[0p3r4t0r]

Here' s a link to the relevant docs for anyone who comes across this in the future.