我的 Discord 机器人的提及帮助命令不起作用。 有人可以帮忙吗？ （Discord.js，JavaScript）

Question

When my bot is mentioned, I want it to execute a particular command. However, when it is mentioned, it throws an error which I will paste below, after my code.

PS: I use a command handler. PS 2: This bot is hosted on repl.it

My index.js code:

const fs = require('fs');
const Discord = require('discord.js');
const hosting = require('./hosting.js');
const client = new Discord.Client();
const token = process.env.botToken;
const {prefix} = require('./config.json');

module.exports = client

client.commands = new Discord.Collection();
const commandFolders = fs.readdirSync('./commands');

for (const folder of commandFolders) {
    const commandFiles = fs.readdirSync(`./commands/${folder}`).filter(file => file.endsWith('.js'));
    for (const file of commandFiles) {
        const command = require(`./commands/${folder}/${file}`);
        client.commands.set(command.name, command);
    }
}




const commandFiles = fs.readdirSync('./commands').filter(file => file.endsWith('.js'));


for (const file of commandFiles) {
    const command = require(`./commands/${file}`);
    client.commands.set(command.name, command);
}

client.once('ready', () => {
  client.user.setPresence({activity: {name: '!1help', type: 'LISTENING'}, status: 'idle'});
  console.log("Bot is running.");
  console.log(client.user.username);
});

const escapeRegex = str => str.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');

client.on('message', message => {

const prefixRegex = new RegExp(`^(<@!?${client.user.id}>|${escapeRegex(prefix)})\\s*`);
if (!prefixRegex.test(message.content)) return;

const [, matchedPrefix] = message.content.match(prefixRegex);
  
const args = message.content.slice(matchedPrefix.length).trim().split(/ +/);
const commandName = args.shift().toLowerCase();




if (message.content === "<@833376214609690674>" || message.content === "<@!833376214609690674>") {
  const mCommand = client.commands.get('help')
  mCommand.execute()
}

if (!client.commands.has(commandName)) return;

const command = client.commands.get(commandName);

try {
    command.execute(message, args);
} catch (error) {
    console.error(error);
    message.reply('There was an error trying to execute that command.');
}
})

client.login(token);

My help.js code (This is the command that I want my bot to execute when it is mentioned):

const { prefix } = require('../../config.json');
module.exports = {
    name: 'help',
  category: "utility",
    description: 'Lists all available commands or info about a specific command.',
    usage: '[command name]',
    execute(message, args) {

const data = [];
const { commands } = message.client

if (!args.length) {
  data.push("Here's a list of all my commands:");
data.push(commands.map(command => command.name).join(', '));
data.push("\nYou can use `{prefix}help [command name]` to get info on a specific command!");

return message.author.send(data, { split: true })
    .then(() => {
        if (message.channel.type === 'dm') return;
        message.reply("I've sent you a DM with all my commands!");
    })
    .catch(error => {
        console.error(`Could not send help DM to ${message.author.tag}.\n`, error);
        message.reply("It seems like I can't DM you! Do you have DMs disabled? If so, please enable them.");
    });
}
const name = args[0].toLowerCase();
const command = commands.get(name) || commands.find(c => c.aliases && c.aliases.includes(name));

if (!command) {
    return message.reply("That's not a valid command!");
}

data.push(`**Name:** ${command.name}`);

if (command.aliases) data.push(`**Aliases:** ${command.aliases.join(', ')}`);
if (command.category) data.push(`**category:** ${command.category}`)
if (command.description) data.push(`**Description:** ${command.description}`);
if (command.usage) data.push(`**Usage:** ${prefix}${command.name} ${command.usage}`);

if (command.cooldown === undefined) {
  data.push(`**Cooldown:** 0 seconds`)
}
else if (command.cooldown === 1) {
  data.push(`**Cooldown:** ${command.cooldown} second`)
}
else {
  data.push(`**Cooldown:** ${command.cooldown} seconds`)
}

message.channel.send(data, { split: true });
},
};

Path to help.js file:

./commands/utility/help.js

Error I recieved in console when bot is mentioned on Discord:

node v12.16.1
/home/runner/MultiBot/commands/utility/help.js:10
const { commands } = message.client
                             ^

TypeError: Cannot read property 'client' of undefined
    at Object.execute (/home/runner/MultiBot/commands/utility/help.js:10:30)
    at Client.<anonymous> (/home/runner/MultiBot/index.js:60:12)
    at Client.emit (events.js:314:20)
    at Client.EventEmitter.emit (domain.js:483:12)
    at MessageCreateAction.handle (/home/runner/MultiBot/node_modules/discord.js/src/client/actions/MessageCreate.js:31:14)
    at Object.module.exports [as MESSAGE_CREATE] (/home/runner/MultiBot/node_modules/discord.js/src/client/websocket/handlers/MESSAGE_CREATE.js:4:32)
    at WebSocketManager.handlePacket (/home/runner/MultiBot/node_modules/discord.js/src/client/websocket/WebSocketManager.js:384:31)
    at WebSocketShard.onPacket (/home/runner/MultiBot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:444:22)
    at WebSocketShard.onMessage (/home/runner/MultiBot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:301:10)
    at WebSocket.onMessage (/home/runner/MultiBot/node_modules/ws/lib/event-target.js:132:16)

Answer 1

execute(message, args) {

I needed to pass in execute and args this way in the if function in index.js:

if (message.content === "<@833376214609690674>" || message.content === "<@!833376214609690674>") {
  const mCommand = client.commands.get('help')
  mCommand.execute(**message, args**)
}

Answer 2

Compare your command handler and your own code to activate on mention

your mention function

mCommand.execute()

the original command handler

command.execute(message, args);

As you see the difference between these two is your pass message, args in the command handler function but not in mCommand.execute()

as your have no parameters passed you cant get anything from the function in help.js

But your trying to access them execute(message, args) {

and as nothing is passed message is undefined (args is also undefined)

Simple fix would be below

mCommand.execute() => mCommand.execute(message, args)

ps: your should learn javascript, its gonna help your in future