I am trying to make a discord.js avatar command, and the mentioning portion doesn't work correctly

Question

I have an avatar command in my discord bot. When the user uses h.avatar, it outputs their avatar, which works fine. Whenever they try to use h.avatar @use

Answer 1

You have a check if (!message.mentions.users.size) { which makes the command run only if you do not mention somebody. You either need to use an else { in your code or do:

 if (message.content.startsWith(config.prefix + 'avatar')) {
    const user = message.mentions.users.first() || message.author;
    const avatarEmbed = new Discord.RichEmbed()
        .setColor(0x333333)
        .setAuthor(user.username)
        .setImage(user.avatarURL);
    message.channel.send(avatarEmbed);
}

The const user = message.mentions.users.first() || message.author; tries to get the user that was mentioned but if it does not find anyone it will use the author's used.

This can also be used like this:

if (!message.mentions.users.size) {
    message.channel.send('Nobody was mentioned');
    return;
}
// continue command here, after guard clause

Answer 2

if(message.content.startsWith(prefix+'av')){
    
        
        if(message.mentions.users.size){
            let member=message.mentions.users.first()
        if(member){
            const emb=new Discord.MessageEmbed().setImage(member.displayAvatarURL()).setTitle(member.username)
            message.channel.send(emb)
            
        }
        else{
            message.channel.send("Sorry none found with that name")

        }
        }else{
            const emb=new Discord.MessageEmbed().setImage(message.author.displayAvatarURL()).setTitle(message.author.username)
            message.channel.send(emb)
        }
}

Answer 3

 if (message.content.startsWith(prefix + 'avatar')) {
   let user = message.mentions.users.first();
   if(!user) user = message.author;
   let color = message.member.displayHexColor;
   if (color == '#000000') color = message.member.hoistRole.hexColor;
   const embed = new Discord.RichEmbed()
                   .setImage(user.avatarURL)
                   .setColor(color)
    message.channel.send({embed});
 }