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how to send a message discord.js

message.reply("message here");
message.channel.send("message here");

how to send a message using discord.js

message.channel.send("a")

send a message using discord.js

message.channel.send("test")

discord client.send_message js

const channel = YOUR_CLIENT_VARIABLE.channels.cache.get('IDFROMYOUCHANEL'); (you can take id on right click on channel)
channel.send('YOUR MESSEGA HERE');

how to send a message using discord.js

client.channels.cache.get('CHANNELID').send('message');

send a message discordjs

message.channel.send("A message!");
message.reply("A message to the sender!");