使Discord.js命令不区分大小写

const { Client, Intents } = require('discord.js');
const client = new Client({ intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES] });

client.once('ready', () => {
    console.log(`Logged in as ${client.user.tag}`);
});

client.on('interactionCreate', async interaction => {
    if (!interaction.isCommand()) return;

    const { commandName } = interaction;

    // 将用户输入的命令转换为小写
    const lowerCaseCommandName = commandName.toLowerCase();

    if (lowerCaseCommandName === 'ping') {
        await interaction.reply('Pong!');
    }
});

client.login('YOUR_BOT_TOKEN');