提到用户时命令不起作用

Question

I have a piece of code that returns a Rich Embed with the Avatar of the mentioned user or the message author if it hasn't got a mention, the code works without mentioning but it doesn't work when mentioning someone. (No error in the console)

if (message.content === prefix + "avatar") {
    const user = message.mentions.users.first()
    if (!message.mentions.users.size) {
        const Embed = new Discord.MessageEmbed()
            .setAuthor(message.author.tag, message.author.avatarURL())
            .setColor("#13e2c0")
            .setTitle("Avatar")
            .setImage(message.author.avatarURL())
        message.channel.send(Embed)
    }
    const Embed = new Discord.MessageEmbed()
        .setAuthor(user.tag, user.avatarURL())
        .setColor("#13e2c0")
        .setTitle("Avatar")
        .setImage(user.avatarURL())
    message.channel.send(Embed)
}

Answer 1

If there are no users mentions, message.mentions.users.size , will always be 0, not NULL or undefined .

---

if (message.content.toLowerCase().startsWith(prefix + "avatar")) {
    const user = message.mentions.users.first() || message.author;
    const Embed = new Discord.MessageEmbed()
        .setAuthor(user.tag, user.avatarURL())
        .setColor("#13e2c0").setTitle("Avatar")
        .setImage(user.avatarURL())
    return message.channel.send(Embed);
}