有人能解释一下如何在本地单独的文件中有一些命令，然后是 Discord.js 的主要 index.js 吗？

Question

I have seen people being able to have a index.js and then other files where the commands are defined. An example:

Index.js

const Discord = require('discord.js');
const client = new Discord.Client();
const prefix = '!'

//Discord Bot Token
const token = 'token here'
client.login(token);


//Checks if the bot is online
client.once('ready', () => {
    console.log(`Logged in as ${client.user.tag}!`);
});

and then a seperate local document "commands.js"

client.on('message', msg => {
 //Makes sure that the bot does not read it's own messages
  if(msg.author.bot) {return;}
  if(msg.content.toLowerCase() === prefix + 'test'){ //Sends the IP
    msg.author.send("test!");
    msg.delete();
}});

Hope someone can help me understand how to do it.

Answer 1

You can use modules to import and export files. Since you are already using require (Node's way of doing this because ES modules are still experimental ) to import Discord.js, you can import and export like this:

module1.js

module.exports = {
  a: 'Hello, world!',
  b: 3
};

module2.js

const module1 = require('./module1');
console.log(module1.a); // Hello, world!
console.log(module1.b); // 3

// You can also use destructuring:
const {a, b} = require('./module1');

For more information on Node.js modules you can read the documentation .

---

In your situation, I recommend reading this guide on setting up a command handler (where commands are stored in separate files). A basic example:

index.js

const {readdirSync} = require('fs');
const {Client, Collection} = require('discord.js');

const prefix = '!';

const client = new Client();
// Create a Collection for the commands
client.commands = new Collection(
  // Get the files in the commands folder
  readdirSync('./commands')
    // Only keep JS files
    .filter(file => file.endsWith('js')
    .map(file => {
      // Import the command
      const command = require(`./commands/${file}`);
      // When creating a collection, you can pass in an iterable (e.g. an array)
      // of [key, value]
      // The commands will be keyed by the command name
      return [command.name, command];
    })
);

client.on('message', message => {
  // Exit if it was sent by a bot
  if (message.author.bot) return;

  // Get the arguments and command name
  const args = message.content.slice(prefix.length).trim().split(/\s+/);
  const command = args.shift();
  // Exit if there isn't a command
  if (!client.commands.has(command)) return;

  // Execute the command
  client.commands.get(command).execute(message, args);
});

const token = 'token here';
client.login(token);

commands/test.js

module.exports = {
  name: 'test',
  execute(message) {
    // '!test' -> 'test'
    message.channel.send('test');
  }
};

commands/args.js

module.exports = {
  name: 'args',
  execute(message, args) {
    // '!args abc 123' -> 'Arguments: abc, 123'
    message.channel.send(`Arguments: ${args.join(', ')}`);
  }
};