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//Discord.js v13
client.channels.cache.get(channelID).send({ content: "Mesage goes here" })
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client.guilds.cache.get(/*server ID*/)
.channels.cache.get(/*channel ID*/)
.send("Hello!")
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client.channels.get("<ID of the channel you want to send to>").send("<your message content here>")
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const channel = client.channels.cache.get('id');
channel.send('content');
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message.guild.channels.cache.get(/* channel ID */).send("welcome in this channel!")
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const channel = client.channels.cache.get('Channel Id');
channel.send({ content: 'This is a message' });
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client.guilds.cache.get("<id>").send("<msg>"); // used for specific channel