grafana/public/app/plugins/datasource/elasticsearch/components/AddRemove.tsx

import { css } from '@emotion/css';

import { Button } from '@grafana/ui';

interface Props {
  index: number;
  elements: unknown[];
  onAdd: () => void;
  onRemove: () => void;
}

/**
 * A component used to show add & remove buttons for mutable lists of values. Wether to show or not the add or the remove buttons
 * depends on the `index` and `elements` props. This enforces a consistent experience whenever this pattern is used.
 */
export const AddRemove = ({ index, onAdd, onRemove, elements }: Props) => {
  return (
    <div
      className={css({
        display: 'flex',
      })}
    >
      {index === 0 && (
        <Button variant="secondary" fill="text" icon="plus" onClick={onAdd} tooltip="Add" aria-label="Add" />
      )}

      {elements.length >= 2 && (
        <Button variant="secondary" fill="text" icon="minus" onClick={onRemove} tooltip="Remove" aria-label="Remove" />
      )}
    </div>
  );
};