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Css – How to Align react-flow__renderer to Top-Left (0,0) with fitView in React Flow?

I’m using React Flow to build a node-based diagram interface. When I render the diagram and apply fitView, the react-flow__renderer does not start at the top-left corner (0,0). Instead, there’s an empty margin or padding space on the left and top (highlighted in yellow in the image below), which I’d like to remove.

enter image description here

I want the react-flow__renderer container to start exactly at the top-left (0,0) of its parent, without any extra space or offset. fitView seems to center the content, but I need it aligned to the top-left corner instead.

Here’s a simplified version of the code I’m using for setting up the React Flow component:

<ReactFlow
nodes={nodes}
edges={edges}
onNodesChange={onNodesChangeCustom}
onEdgesChange={onEdgesChange}
onConnect={onConnect}
nodeTypes={nodeTypes}
fitView
panOnScroll
selectionOnDrag
fitViewOptions={{
 padding: 0.5,
}}
className={` nowheel ml ${isEditMode ? 'bg-yellow-50' : ''} `}
>
<Background />
</ReactFlow>

enter image description here

How can I make the react-flow__renderer start at the exact top-left (0,0) of its container without any offset? Is there a way to configure fitView or the React Flow container to achieve this?

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2

Answers


  1. 0

    Well. what about giving false to the fitView in the ReactFlow to disable automatic centering and padding: 0 to the fitViewOptions just to remove the margin or offset?
    fitView has the default behavior of automatic centering so making it false diables it.
    if you make the padding: 0, it removes any padding that makes an offset or margin from top-left corner.
    And so it will make react-flow_renderer start at the exact top-left(0,0) without any offset.

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  2. 0

    As far as I understand, you want your nodes to start from the top left corner. There is a simple way to do this. Remove the fitView prop. Set your top node to position: { x: 0, y: 0 }. Set the values ​​of the other nodes accordingly. As an example, I am adding the following definition code. I hope this helps.

    const initialNodes = [
  {
    id: '1',
    data:{label:'Component 1'},
    position: { x: 0, y: 0 },
  },
  {
    id: '2',
    data:{label:'Component 2'},
    position: { x: 0, y: 100 },
  },
];
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