使用 Discord.js 向频道发送消息时遇到问题

I'm trying to make a bot that sends a message to a channel once a user sends a specific message. I've managed to make it send a message once the bot logs in, but the client.on() function won't do anything. Please let me know if I'm doing something wrong, thank you in advance!

const { Client, Intents } = require("discord.js");

const client = new Client({ intents: [Intents.FLAGS.GUILDS] });

client.login("<bot token>");

client.once("ready", () => {
console.log("Ready!");

channel.send("hello world"); //This works

const guild = client.guilds.cache.get("<server id>");
const channel = guild.channels.cache.get("<channel id>");

//This is the issue. Nothing happens when I send "!ping" in the server
client.on("message", message => {
    if (message.content === "!ping") {
        channel.send("pong");
    }
});
});

推荐答案

您需要启用 GUILD_MESSAGES Intent:

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