bot tags the person you tag discord.js code example

Example 1: discord.js get first mention

let member = msg.members.mentions.first();
if(msg.content === 'name'){
	msg.channel.send(member)
}

Example 2: check if message mentions users discord js

// 1st Way
if (<Message>.mentions.members.size) { // or message.mentions.members.size > 0
  //DO STUFF
}

// 2nd Way
if (<Message>.mentions.members.first()) {
  //DO STUFF
}