Javascript 侦听器参数必须是function类型。收到未定义的错误

我的代码有点问题，错误如下：

   events.js:111
    throw new ERR_INVALID_ARG_TYPE('listener', 'Function', listener);
    ^

TypeError [ERR_INVALID_ARG_TYPE]: The "listener" argument must be of type function. Received undefined
?[90m    at checkListener (events.js:111:11)?[39m
?[90m    at _addListener (events.js:348:3)?[39m
?[90m    at Client.addListener (events.js:406:10)?[39m
    at Object.<anonymous> (C:\Users\USER\Desktop\discordjs\index.js:23:8)
?[90m    at Module._compile (internal/modules/cjs/loader.js:1137:30)?[39m
?[90m    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)?[39m
?[90m    at Module.load (internal/modules/cjs/loader.js:985:32)?[39m
?[90m    at Function.Module._load (internal/modules/cjs/loader.js:878:14)?[39m
?[90m    at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)?[39m
?[90m    at internal/main/run_main_module.js:17:47?[39m {
  code: ?[32m'ERR_INVALID_ARG_TYPE'?[39m
}

有人知道怎么修吗？我将非常感谢。

您想要

client.on（“message”，async message=>{…}）

而不是

client.on（“message”），async message=>{…}

上的

。
   client.on("message"), async message => {
    const prefix = ">";

    if (message.author.bot) return;
    if (!message.guild) return; 
    if (!message.content.startsWith(prefix)) return;

    const args = message.content.slice(prefix.length).trim().split(/ +/g);
    const cmd = args.shift().toLowerCase();

    if (cmd === "ping") {
        const msg = await message.channel.send(":ping_pong: Pong!")

        msg.edit(`:ping_pong: Pong!\nLatency Is ${Math.floor(msg.createdAt - message.createdAt)}\nAPI Latency ${Math.round(client.ws.ping)}ms`);
    }
};