How can I detect whether a message is sent in a DM with discord.js v14?

I’ve been using discord.js v12 until I was recently forced to switch to v14 because v12 doesn’t work anymore. I’ve looked through the docs and found .isDMBased() but it doesn’t work any help?

Code:

    if(message.channel.isDMBased) {
        console.log('DM')
    } else {
        console.log('Server')
    }

I’ve tried sending a message in DMs and it doesn’t do anything. But when I send a message in the server channel it logs “DM”