Checking message length with Discord.js

Question

I am trying to determine the length of a message in a channel. I can't find what to put for the message length, I tried this on a channel that isn't mine, and it didn't seem to work, no error code were thrown, it just doesn't work.

---

This is my code so far:

const Discord = require('discord.js')
const bot = new Discord.Client()

bot.on('ready', () => {
  console.log("connected");
});

bot.on('message', (message) => {
  if(message.channel.id === '549389103071969869') {
    if(message.length !== '4') {
      message.delete()
    }
  }
});

Answer 1

The message parameter is the entire message object. For example, message.author , message.id , etc.

What you are looking for is message.content , the actual text in the message.

Also, make sure the number you're comparing the length property to is a Number , not a String as it is now.

if (message.content.length !== 4) { // 4, not "4"

---

Answer 2

What you want to do is use message.content.length . message.length will return undefined as .length doesn't work on an object property.

---

---

What you want to use is message.content.length to find the length of message.content .

---

---

---

As you can see in the first picture, it returned undefined . And then in the second picture, it shows the content of the message, which is what we wanted, and lastly the third one (for eval purposes i used message.channel.messages.cache.get() to get the exact message in the second picture) is the message content's length.

---

For your code, the answer will be as such:

const Discord = require('discord.js')
const bot = new Discord.Client()

bot.on('ready', () => {
  console.log("connected");
});

bot.on('message', (message) => {
  if(message.channel.id === '549389103071969869') {
    
    // Use `message.content.length`
    if(message.content.length !== 4) {
    // Do mind that '4' is a string, and what you want is the length (a number), so you shouldn't put quotes around it.

      // If the message length isn't 4, then delete it.
      message.delete()
    }
  }
});

---

For more information, visit the links below:

• Discord.js.org - Docs - Message
• Discord.js.org - Docs - Message#Content
• W3Schools - Guide, Docs - String length Property
• TechOnTheNet - Guide - String length Property
• MDN web docs - Guide - String length

These are the docs on how I used message.channel.messages.cache.get() .

• Discord.js.org - Docs - MessageManager#Cache
• Discord.js.org - Docs - Collection#Get