discord.js 無法讀取未定義的屬性“第一個”

Question

    name: 'purge',
    description: "Purge messages from the chat.",
    execute(message, args, Discord){
        const Error = new Discord.MessageEmbed()
        .setTitle("Correct Usage")
        .setColor('#4e5d94')
        .setDescription("```>purge [integer] [<channel>]```");
        if(message.member.permissions.has("MANAGE_MESSAGES")){
            if(!args[0]) return message.reply(Error);
            if(isNaN(args[0])) return message.reply(Error);
            if(args[0] > 150) return message.reply(Error.setDescription("```Integer should be smaller than 150```".setTitle("Error")));
            if(args[0] <= 0) return message.reply(Error.setDescription("```Integer should be bigger than 0```").setTitle("Error"));
            if(args[1]){
                try{
                    let channel = message.mentions.channel.first();
                    channel.bulkDelete(args[0]);
                    message.channel.send(Error.setTitle("Cleared").setDescription("```Successfully cleared " + args[0] + " messages from " + channel + "```"))
                }catch(e){
                    console.log(e)
                    message.reply(Error.setTitle("Error").setDescription("```Client has run into a problem , please contact the developers.```"))
                }
            } else{
                message.channel.bulkDelete(args[0]);
                message.channel.send(Error.setTitle("Cleared").setDescription("```Successfully cleared " + args[0] + " messages```"))
            }
        } else{
            message.reply(Error.setTitle("Permission").setDescription("```Insufficient permission.```"))
        }
    }
}

錯誤是：無法讀取未定義的“第一”屬性，它曾經可以工作，但由於某種原因它不會，有人可以幫助我嗎？ 我一直在嘗試解決這個問題

Answer 1

您正在尋找

let channel = message.mentions.channels.first();

（注意復數channels ）

https://discord.js.org/#/docs/main/stable/class/MessageMentions?scrollTo=channels

https://discord.js.org/#/docs/collection/master/class/Collection?scrollTo=first

Answer 2

這是我朋友的一個簡單的錯字案例。

它應該是

                    let channel = message.mentions.channels.first();

由於 message.mentions.channels 是您嘗試訪問的屬性。