Discord API Error: Cannot send an empty message

Question

I'm writing a simple discord bot that just spews out a randomly selected response from a list but I keep running into the same Discord API error.

Here's my code.

client.on('messageCreate', message => {
const responses = [['Yehaw', 'Yehaw!!', 'Yahee', 'Cowboy shit']];
let randomNumber = Math.floor(Math.random() * Math.floor(responses.length));
let randomMessage = responses[randomNumber];
if (message.author.bot) return;

if (message.content.includes ('Yehaw'))
    message.channel.send(randomMessage);
});

Here's my error message

        DiscordAPIError: Cannot send an empty message
at RequestHandler.execute (C:\Users\User\Desktop\DiscordBot\node_modules\discord.js\src\rest\RequestHandler.js:350:13)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at async RequestHandler.push (C:\Users\User\Desktop\DiscordBot\node_modules\discord.js\src\rest\RequestHandler.js:51:14)
at async TextChannel.send (C:\Users\User\Desktop\DiscordBot\node_modules\discord.js\src\structures\interfaces\TextBasedChannel.js:176:15) {

method: 'post', path: '/channels/976509969199407185/messages', code: 50006, httpStatus: 400,

I've tried a few variations on the message selection method but they all throw the same error

Also have a look at Generating random integer in range that doesn't start at zero to improve your random number generation. — cachius
– cachius, Commented May 21, 2022 at 17:30

Caladan · Accepted Answer · 2022-05-20 16:51:43Z

The reason why you are getting this error is because you are trying to send an array instead of text. If you look closely at your code, you will notice that the actual responses array is inside another array, so when you randomly pick one, it will always be the full array instead of one of the responses in it. So randomMessage will always be this array => ["Yehaw", "Yehaw!!", "Yahee", "Cowboy shit"]. discord.js cannot send arrays as text which is why you are getting this error. So all you have to do is remove the extra square brackets so your final code might look something like this:

client.on("messageCreate", (message) => {
  const responses = ["Yehaw", "Yehaw!!", "Yahee", "Cowboy shit"];
  let randomNumber = Math.floor(Math.random() * Math.floor(responses.length));
  let randomMessage = responses[randomNumber];
  if (message.author.bot) return;

  if (message.content.includes("Yehaw")) message.channel.send(randomMessage);
});

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