unban command with discord.js v12

Question

我试图生成一个unban命令，但收到一个错误const member;错误：常量声明中缺少初始值设定项

client.on('message', async message => {
if (message.content.toLowerCase().startsWith(prefix + "unban"))
if (!message.member.hasPermission("BAN_MEMBERS")) {
return message.channel.send(`You cant use this command since you're missing "BAN_MEMBERS" perm`)
}
if (!args[0]) return (await message.channel.send('pls enter a users id to unban.')).then(msg => msg.delete({timeout: 5000}))
const member;
try {
member = await client.users.fetch(args[0])
} catch (e) {
console.log(e)
return message.channel.send(('an error accured'));
}
const reason = args[1] ? args.slice(1).join(' ') : 'no reason';
const newEmbed = new Discord.MessageEmbed()
.setFooter(`${message.author.tag} | ${message.author.id}`, message.author.displayAvatarURL({dynamic: true}))  
message.guild.fetchBans().then( bans => {
const user = bans.find(ban => ban.user.id === member.id);
if (user) {
newEmbed.setTitle(`Successfully Unbanned ${user.user.tag}`)
.setColor('#FFFF00')
.addField({name: 'User ID', value: user.user.id, inline: true})
.addField({name: 'User Tag', value: user.user.tag, inline: true})
.addField({name: 'Banned Reason', value: user.reason})
message.channel.send(newEmbed)
}})})

Answer 1

const表示变量将是不可变的(常量(。因此，声明const类型的变量而不立即为其赋值是毫无意义的，在Javascript中也是不允许的。

要生成可变变量，应该使用let而不是const。

因此，在您的代码中，第7行应该是这样的：

let member;