check if message come from user id discord.js code example

Example 1: 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
}

Example 2: how to check if a user sent a message in discord js

if(message.author.id === client.user.id) return;