reducerSnippet

reducer.js

case VOTE_COMMENT_SUCCESS:
      return {
        ...state,
        comments: state.comments.map(comment =>
          comment.id === action.id
            ? {
                ...comment,
                cached_votes_up: action.data.vote_up,
                cached_votes_down: action.data.vote_down,
              }
            : comment.children[0]?.id === action.id
            ? {
                ...comment,
                children: [
                  {
                    ...comment.children[0],
                    cached_votes_up: action.data.vote_up,
                    cached_votes_down: action.data.vote_down,
                  },
                ],
              }
            : comment
        ),
      };