Repository: discordjs/discord.js
File: packages/discord.js/src/structures/interfaces/InteractionResponses.js (JavaScript)

Code before:
  async reply(options) {
    if (this.deferred || this.replied) throw new DiscordjsError(ErrorCodes.InteractionAlreadyReplied);

    let messagePayload;
    if (options instanceof MessagePayload) messagePayload = options;
    else messagePayload = MessagePayload.create(this, options);

    const { body: data, files } = await messagePayload.resolveBody().resolveFiles();

    this.ephemeral = new MessageFlagsBitField(data.flags).has(MessageFlags.Ephemeral);

    const response = await this.client.rest.post(Routes.interactionCallback(this.id, this.token), {
      body: {
        type: InteractionResponseType.ChannelMessageWithSource,
        data,
      },
      files,
      auth: false,
      query: makeURLSearchParams({ with_response: options.withResponse ?? false }),
    });
    this.replied = true;

    if (options.withResponse) {
      return new InteractionCallbackResponse(this.client, response);
    } else {
      return options.fetchReply ? this.fetchReply() : new InteractionResponse(this);
    }
  }

  /**
   * Fetches a reply to this interaction.
   * @see Webhook#fetchMessage
   * @param {Snowflake|'@original'} [message='@original'] The response to fetch
   * @returns {Promise<Message>}
   * @example
   * // Fetch the initial reply to this interaction
   * interaction.fetchReply()
   *   .then(reply => console.log(`Replied with ${reply.content}`))
   *   .catch(console.error);
   */
  fetchReply(message = '@original') {
    return this.webhook.fetchMessage(message);
  }

  /**
   * Options that can be passed into {@link InteractionResponses#editReply}.
   * @typedef {WebhookMessageEditOptions} InteractionEditReplyOptions
   * @property {MessageResolvable|'@original'} [message='@original'] The response to edit
   */

  /**

Review comment (suggestion):
```suggestion

    return options.fetchReply ? this.fetchReply() : new InteractionResponse(this);
```

Code after:
    const { body: data, files } = await messagePayload.resolveBody().resolveFiles();

    const response = await this.client.rest.post(Routes.interactionCallback(this.id, this.token), {
      body: {
        type: InteractionResponseType.ChannelMessageWithSource,
        data,
      },
      files,
      auth: false,
      query: makeURLSearchParams({ with_response: options.withResponse ?? false }),
    });

    this.ephemeral = Boolean(options.flags & MessageFlags.Ephemeral);
    this.replied = true;

    return options.withResponse
      ? new InteractionCallbackResponse(this.client, response)
      : new InteractionResponse(this);
  }

  /**
   * Fetches a reply to this interaction.
   * @see Webhook#fetchMessage
   * @param {Snowflake|'@original'} [message='@original'] The response to fetch
   * @returns {Promise<Message>}
   * @example
   * // Fetch the initial reply to this interaction
   * interaction.fetchReply()
   *   .then(reply => console.log(`Replied with ${reply.content}`))
   *   .catch(console.error);
   */
  fetchReply(message = '@original') {
    return this.webhook.fetchMessage(message);
  }

  /**
   * Options that can be passed into {@link InteractionResponses#editReply}.
   * @typedef {WebhookMessageEditOptions} InteractionEditReplyOptions
   * @property {MessageResolvable|'@original'} [message='@original'] The response to edit
   */

  /**
   * Edits a reply to this interaction.
   * @see Webhook#editMessage
   * @param {string|MessagePayload|InteractionEditReplyOptions} options The new options for the message
   * @returns {Promise<Message>}
   * @example
   * // Edit the initial reply to this interaction
   * interaction.editReply('New content')
   *   .then(console.log)
   *   .catch(console.error);