sentry/static/app/utils/profiling/flamegraph/hooks/useFlamegraphZoomPosition.tsx

import {useContext} from 'react';

import {
  FlamegraphState,
  FlamegraphStateValueContext,
} from '../flamegraphStateProvider/flamegraphContext';

export function useFlamegraphZoomPosition(): FlamegraphState['position'] {
  const context = useContext(FlamegraphStateValueContext);

  if (context === null) {
    throw new Error('useFlamegraphState called outside of FlamegraphStateProvider');
  }

  return context[0].position;
}