help.js

const { MessageEmbed } = require("discord.js");
const { prefix, developerID } = require("../../config.json")
module.exports = {
  name: "help",
  description:
    "Get list of all command and even get to know every command details",
  usage: "help <cmd>",
  category: ":frame_photo: WELCOME",
  run: async (client, message, args) => {
  
    if (args[0]) {
      const command = await client.commands.get(args[0]);

      if (!command) {
        return message.channel.send(`Unknown Command: ${args[0]}`);
      }

      const embed = new MessageEmbed()
        .setAuthor(command.name, client.user.displayAvatarURL())
        .addField("Description", command.description || "Description is not provided join support server for help")
        .addField("Usage", `\`${command.usage}\`` || "Not Provided Join Support server for help")
        .addField("Aliases", `\`\`\`${command.aliases}\`\`\``|| "There is no aliases")
        .setThumbnail(client.user.displayAvatarURL())
        .setColor("#000000")
        .setFooter(`Join our support server `);

      return message.channel.send(embed).then(m => m.delete({ timeout: 8000 }));
    }
    const commands = await client.commands;

    const emx = new MessageEmbed()
      .setDescription(`**Note:** You must set \`welcomechannel\` \`description\`, \`thumnail\` to start welcome and to use test command. 

      Only for \`${prefix}setwelcomechannel\` [ Compulsory ]
      setwelcomechannel <#channel>

      Only for \`${prefix}setdescription\` [ Compulsory ]
      **Tags** : **Info** : **Example**
      ?user : Display username only : Atreya
      ?tag : Display username with tag : Atreya#2401
      ?mention : Mention user in description : <@519666024220721152>
      ?server : Display server name : Aromax Development
      ?rank : Position to join server : 69th Member

      Only for \`${prefix}setthumbnail\` [ Compulsory ]
      **Tags** : **Info**
      ?serveravatar : Display server avatar in Thumnail
      ?useravatar : Display new member avatar in Thumnail

      Only for \`${prefix}setimage\` [ Optional ]
      You have to provide valid link 

      Only for \`${prefix}setimagewelcome\` [ Optional ]
      setimagewelcome <#channel> : Send message of image only 

      Only for \`${prefix}reset\` 
      It resets all the things of description, image, thumnail, welcome channel.

      Only for \`${prefix}test\`
      Use this command by completing all the [ Compulsory ] marked things.

       Do \`${prefix}help <command>\` to see aliases of that command`)
       
      .setColor("#FFFFF0")
      .setFooter(`Code Owner: Atreya#2401`)
    

    const com = {};
    for (let comm of commands.array()) {
      const category = comm.category || "Unknown";
      const { name } = comm;

      if (!com[category]) {
        com[category] = [];
      }
      com[category].push(name);
    }

    for(const [key, value] of Object.entries(com)) {
      const category = key;

      const desc = `\`${value.join("` • `")}\``;

      emx.addField(`${category}`, desc);
    }

    const msg = await message.channel.send(emx)
  }
};