Discord.js: MessageAttachment is not defined - discord.js

Question

I'm having trouble making my bot filter messages and respond with a local file from my computer. Here is the code:
client.on("message", msg => {
console.log(msg.content);
let wordArray = msg.content.split(" ")
console.log(wordArray)
let filterWords = ['test']
for(var i = 0; i < filterWords.length; i++) {
if(wordArray.includes(filterWords[i])) {
msg.delete()
// Create the attachment using MessageAttachment
const attachment = new MessageAttachment('cbcfilter.png');
msg.channel.send(attachment)
}
}
});
It gives me this error message:
ReferenceError: MessageAttachment is not defined
at Client.<anonymous> (/Users/DShirriff/cbcbot/bot.js:108:26)
at Client.emit (events.js:323:22)
at MessageCreateAction.handle (/Users/DShirriff/cbcbot/node_modules/discord.js/src/client/actions/MessageCreate.js:31:14)
at Object.module.exports [as MESSAGE_CREATE] (/Users/DShirriff/cbcbot/node_modules/discord.js/src/client/websocket/handlers/MESSAGE_CREATE.js:4:32)
at WebSocketManager.handlePacket (/Users/DShirriff/cbcbot/node_modules/discord.js/src/client/websocket/WebSocketManager.js:386:31)
at WebSocketShard.onPacket (/Users/DShirriff/cbcbot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:435:22)
at WebSocketShard.onMessage (/Users/DShirriff/cbcbot/node_modules/discord.js/src/client/websocket/WebSocketShard.js:293:10)
at WebSocket.onMessage (/Users/DShirriff/cbcbot/node_modules/ws/lib/event-target.js:120:16)
at WebSocket.emit (events.js:311:20)
at Receiver.receiverOnMessage (/Users/DShirriff/cbcbot/node_modules/ws/lib/websocket.js:801:20)
Am I an idiot and missing a simple parentheses, or should I look for a different form of this line of code?

Answer 1

You need to import MessageAttachment.
If you're using require to import discord.js then you can do:
const Discord = require('discord.js')
const attachment = new Discord.MessageAttachment('cbcfilter.png');
If you're using import then you can do:
import { MessageAttachment } from 'discord.js'
const attachment = new MessageAttachment('cbcfilter.png');
Side note: you don't have to construct a MessageAttachment you can just do
msg.channel.send({files: ['cbcfilter.png']})
OR
msg.channel.send({
files: [{
attachment: 'entire/path/to/cbcfilter.png',
name: 'cbcfilter.png'
}]
})