How can I make a random response in Discord.js

Question

The title explains it I guess. I have no code written down and it would be nice if someone explains the steps to the code. I want it to send a random link for a wallpaper from a website each time the command 'a wallpaper' is used. Any helpers?

Answer 1

You would have to create an Array containing the responses you want to send. Then, you can use Math.random to get a random number between 0 and 1 (1 inclusive) and Math.floor to get the index ranging from 0 to arrayLength - 1.

const Responses = [
    "image 1",
    "image 2",
    "image 3",
    "image 4",
    "image 5"
];

const Response = Math.floor(Math.random() * Responses.length);

console.log(Responses[Response])

---

client.on("message", message => {
    if (message.author.bot) return false;
    if (!message.guild) return false;
    if (message.content.indexOf(Prefix) !== 0) return false;

    const arguments = message.content.slice(Prefix.length).split(/ +/g); // Splitting the message.content into an Array with the arguments.
    // Input --> !test hello
    // Output --> ["test", "hello"]

    const command = arguments.shift().toLowerCase();
    // Removing the first element from arguments since it's the command, and storing it in a variable.

    if (command == "random") {
        const Response = Math.floor(Math.random() * Responses.length);
        message.channel.send(`Here is your random response: ${Responses[Response]}`);
    };
});

Answer 2

client.on('message', (message) => {
 if (message.content.startsWith('!wallpaper')) {

// Here you can choose between creating your array with your own links or use a api that will generate it for you. For now i'll use an array

  const wallpapers = [
   'https://cdn.discordapp.com/attachments/726436777283289088/734088186711769088/images.png',
   'https://cdn.discordapp.com/attachments/726436777283289088/734088144730718258/images.png',
   'https://cdn.discordapp.com/attachments/726436777283289088/734087421918183484/images.png',
   // You can add as many as you want
  ];
  // Here we will create a random number. Math.random only creates a randomly generated number between 0 and 1.
  const response = wallpapers[Math.floor(Math.random() * wallpapers.length)];
  message.reply(response);
 }
});

If you'd like, you can see more information about randomization in w3school / Randomization