explore/lib/hooks/useFirstMountState.tsx

import React from 'react';

// Returns true if component is just mounted (on first render) and false otherwise.
export function useFirstMountState(): boolean {
  const isFirst = React.useRef(true);

  if (isFirst.current) {
    isFirst.current = false;

    return true;
  }

  return isFirst.current;
}