Type safe Slash Commands Options ?

Hi there, I can't seem to find a way to add Type Safe options to a Slash command. See Example:

public override registerApplicationCommands(registry: Command.Registry) {
        registry.registerChatInputCommand((builder) =>
            builder //
                .setName(this.name)
                .setDescription(this.description)
                .addStringOption((builder) => {
                    return builder
                        .setName('difficulty')
                        .setDescription('Choose a difficulty')
                        .addChoices({ name: 'Easy', value: 'easy' }, { name: 'Medium', value: 'medium' }, { name: 'Hard', value: 'hard' });
                })
        );
    }

public override registerApplicationCommands(registry: Command.Registry) {
        registry.registerChatInputCommand((builder) =>
            builder //
                .setName(this.name)
                .setDescription(this.description)
                .addStringOption((builder) => {
                    return builder
                        .setName('difficulty')
                        .setDescription('Choose a difficulty')
                        .addChoices({ name: 'Easy', value: 'easy' }, { name: 'Medium', value: 'medium' }, { name: 'Hard', value: 'hard' });
                })
        );
    }

I have a Type called type Difficulty = 'easy' | 'medium' | 'hard' and functions that expect this type. But the interaction.options.getString('difficulty', false) method simply returns string. Which means I need to add as Difficulty to it. And I feel like it defeats a little bit the purpose of TypeScript when I do this. So I was wondering if there was a better way to handle this, or should I just rely on Runtime checking ? Thanks ❤️

1 Reply

Favna•15mo ago

You'll have to cast it. Discordjs doesn't offer a way to make it type safe directly. Just add as Difficulty

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Type safe Slash Commands Options ?