Repository: microsoft/vscode
File: src/vs/workbench/contrib/comments/browser/commentNode.ts (TypeScript)

Code before:
				actionViewItemProvider: (action, options) => {
					if (action.id === ToggleReactionsAction.ID) {
						return toggleReactionActionViewItem;
					}
					return this.actionViewItemProvider(action as Action, options);
				},
				classNames: 'toolbar-toggle-pickReactions',
				anchorAlignmentProvider: () => AnchorAlignment.RIGHT
			}
		));

		return toggleReactionAction;
	}

	private createReactionsContainer(commentDetailsContainer: HTMLElement): void {
		this._reactionActionsContainer?.remove();
		this._reactionsActionBar.clear();
		this._reactionActions.clear();

		this._reactionActionsContainer = dom.append(commentDetailsContainer, dom.$('div.comment-reactions'));
		this._reactionsActionBar.value = new ActionBar(this._reactionActionsContainer, {
			actionViewItemProvider: (action, options) => {
				if (action.id === ToggleReactionsAction.ID) {
					return new DropdownMenuActionViewItem(
						action,
						(<ToggleReactionsAction>action).menuActions,
						this.contextMenuService,
						{
							actionViewItemProvider: (action, options) => this.actionViewItemProvider(action as Action, options),
							classNames: ['toolbar-toggle-pickReactions', ...ThemeIcon.asClassNameArray(Codicon.reactions)],
							anchorAlignmentProvider: () => AnchorAlignment.RIGHT
						}
					);
				}
				return this.actionViewItemProvider(action as Action, options);
			}
		});

		const hasReactionHandler = this.commentService.hasReactionHandler(this.owner);
		this.comment.commentReactions?.filter(reaction => !!reaction.count).map(reaction => {
			const action = this._reactionActions.add(new ReactionAction(`reaction.${reaction.label}`, `${reaction.label}`, reaction.hasReacted && (reaction.canEdit || hasReactionHandler) ? 'active' : '', (reaction.canEdit || hasReactionHandler), async () => {
				try {
					await this.commentService.toggleReaction(this.owner, this.resource, this.commentThread, this.comment, reaction);
				} catch (e) {
					let error: string;

					if (reaction.hasReacted) {
						error = e.message
							? nls.localize('commentDeleteReactionError', "Deleting the comment reaction failed: {0}.", e.message)
							: nls.localize('commentDeleteReactionDefaultError', "Deleting the comment reaction failed");
					} else {

Review comment (suggestion):
maybe we shall create the container even if there is not reaction, but if there is a reaction handler
This way, adding the first reaction would still be possible
```suggestion
		if (!hasReactionHandler) {
			return;
		}
```

Code after:
				actionViewItemProvider: (action, options) => {
					if (action.id === ToggleReactionsAction.ID) {
						return toggleReactionActionViewItem;
					}
					return this.actionViewItemProvider(action as Action, options);
				},
				classNames: 'toolbar-toggle-pickReactions',
				anchorAlignmentProvider: () => AnchorAlignment.RIGHT
			}
		));

		return toggleReactionAction;
	}

	private createReactionsContainer(commentDetailsContainer: HTMLElement): void {
		this._reactionActionsContainer?.remove();
		this._reactionsActionBar.clear();
		this._reactionActions.clear();

		const hasReactionHandler = this.commentService.hasReactionHandler(this.owner);
		const reactions = this.comment.commentReactions?.filter(reaction => !!reaction.count) || [];

		// Only create the container if there are reactions to show or if there's a reaction handler
		if (reactions.length === 0 && !hasReactionHandler) {
			return;
		}

		this._reactionActionsContainer = dom.append(commentDetailsContainer, dom.$('div.comment-reactions'));
		this._reactionsActionBar.value = new ActionBar(this._reactionActionsContainer, {
			actionViewItemProvider: (action, options) => {
				if (action.id === ToggleReactionsAction.ID) {
					return new DropdownMenuActionViewItem(
						action,
						(<ToggleReactionsAction>action).menuActions,
						this.contextMenuService,
						{
							actionViewItemProvider: (action, options) => this.actionViewItemProvider(action as Action, options),
							classNames: ['toolbar-toggle-pickReactions', ...ThemeIcon.asClassNameArray(Codicon.reactions)],
							anchorAlignmentProvider: () => AnchorAlignment.RIGHT
						}
					);
				}
				return this.actionViewItemProvider(action as Action, options);
			}
		});

		reactions.map(reaction => {
			const action = this._reactionActions.add(new ReactionAction(`reaction.${reaction.label}`, `${reaction.label}`, reaction.hasReacted && (reaction.canEdit || hasReactionHandler) ? 'active' : '', (reaction.canEdit || hasReactionHandler), async () => {
				try {
					await this.commentService.toggleReaction(this.owner, this.resource, this.commentThread, this.comment, reaction);
				} catch (e) {