Setting up Slash Commands

You will need to follow properties to create a regular command and the following data, and interactionReply properties to create a slash command.

data: new SlashCommandBuilder(),
async interactionReply(interaction) {},

Here is a sample slash command created from our previous ping command:

const { SlashCommandBuilder } = require("discord.js");

module.exports = {
    name: 'ping',
    description: 'Ping Pong Command!',
    aliases: ['p'],
    guildOnly: true,
    permissions: 0,
    minArgs: 0, 
    usage: '',
        data: new SlashCommandBuilder()
        .setName("ping")
        .setDescription("Ping Pong Command"),
    execute(message, args, client) {
        return message.channel.send('Pong.');
    },
    async interactionReply(interaction) {
        await interaction.reply({
            content: 'Pong!'
        });
    }
};

Properties

dataSlashCommandBuilder
This is where you define the properties of the slash command using the SlashCommandBuilder Class. You can follow the official Discord.js guide or builders guide, however, we are using interactionReply and not using execute for the slash command functionality.

interactionReply(interaction, client, level) Promise<Interaction>
This is a function that is invoked when the command is called to be executed.

Property	Type	Required	Description
interaction	CommandInteraction Class	true	This is the command interaction object that represents a slash command interaction on Discord.
client	Discord.Client	false	This is the Discord client object.
level	Number	false	This is the user's permission level.

returns Promise<Interaction>