How to make discord.js bots check if the channel is NSFW and reply?

Question

I want to make my discord bot send different messages when anyone types a command in a normal channel or NSFW channels.

I followed the documentation, which I didn't quite get it. I wrote the testing commands below:

client.on('message', message => {
    if (command === 'testnsfw') {
        if (this.nsfw = Boolean(true.nsfw)) {
            return message.channel.send('yes NSFW');
        } else return message.channel.send('no NSFW');
    }
})

I think it is not working. The bot only responds "no NSFW" on both channels.

Answer 1

You cannot refer to the TextChannel using this in the anonymous function. (Also, this is always undefined in an arrow function) You can access the TextChannel using the Message class, stored in the message variable.

---

client.on("message", message => {
    // Making the sure the author of the message is not a bot.
    // Without this line, the code will create an infinite loop of messages, because even if a message is sent by a bot account, the client will emit the message event.
    if (message.author.bot) return false;

    // message.content is a String, containing the entire content of the message.
    // Before checking if it equals to "testnsfw", I would suggest to transform it to lowercase first.
    // So "testNSFW", "testnsfw", "TeStNsFw", etc.. will pass the if statement.
    if (message.content.toLowerCase() == "testnsfw") {
        // You can get the Channel class (which contains the nsfw property) using the Message class.
        if (message.channel.nsfw) {
            message.channel.send("This channel is NSFW.");
        } else {
            message.channel.send("This channel is SFW.");
        }
    }
});

---

What I encourage you to read:

• Message
• TextChannel

Answer 2

now you can just do this instead

if(!message.channel.nsfw) return message.channel.send('a message to send to channel')

this is using discord.js verson 13.6.0