useOnViewportChange()

GitHub 上的源代码 

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useOnViewportChange 钩子可让你监听视口的变化，例如平移和缩放。你可以为视口更改的每个阶段提供回调：onStart、onChange 和 onEnd。

¥The useOnViewportChange hook lets you listen for changes to the viewport such as panning and zooming. You can provide a callback for each phase of a viewport change: onStart, onChange, and onEnd.

import { useCallback } from 'react';
import { useOnViewportChange } from '@xyflow/react';
 
function ViewportChangeLogger() {
  useOnViewportChange({
    onStart: (viewport: Viewport) => console.log('start', viewport),
    onChange: (viewport: Viewport) => console.log('change', viewport),
    onEnd: (viewport: Viewport) => console.log('end', viewport),
  });
 
  return null;
}

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注释

¥Notes

• 此钩子只能在作为 <ReactFlowProvider /> 或 <ReactFlow /> 组件的子组件中使用。

  ¥This hook can only be used in a component that is a child of a <ReactFlowProvider /> or a <ReactFlow /> component.