Discord斜杠头像命令报错DiscordAPIError: Unknown Webhook怎么解决？

错误原因 #

你遇到的DiscordAPIError: Unknown Webhook（错误码10015）是因为Discord斜杠命令交互的初始响应规则要求：

• 交互触发后3秒内必须完成首次响应，否则交互对应的临时webhook会直接失效
• followUp是用于首次响应完成后追加发送消息的方法，不能直接用作首次交互响应

修复方法 #

二选一即可：

方案1：直接替换响应方法 #

如果你不需要延迟处理，直接把inter.followUp改成inter.reply，修改后代码如下：

const Client = require("../../bot").Client
const Discord = require('discord.js');

module.exports.run = async (inter) => {
    const user = inter.options.getUser('target')

    const embed = new Discord.MessageEmbed()
        .setTitle(`${user.username}'s Avatar`)
        .setColor('#FFA500')
        .setImage(user.displayAvatarURL({
            dynamic: true,
            size: 1024
        }))
        .setTimestamp()
        .setDescription(`[Png](${user.avatarURL({ format: 'png' })}) | [Webp](${user.avatarURL({ dynamic: true })}) | [Jpg](${user.avatarURL({ format: 'jpg' })})`)
        .setFooter(`Requested by: ${inter.user.username}`, inter.user.displayAvatarURL({ dynamic: true }));
    
    // 把followUp改成reply
    await inter.reply({
        embeds: [embed]
    }); 
}

module.exports.help = {
    name: 'avatar',
}

方案2：先延迟响应再回复 #

如果你的命令后续可能有更耗时的操作，先调用deferReply延长交互有效期到15分钟，再用followUp回复：

const Client = require("../../bot").Client
const Discord = require('discord.js');

module.exports.run = async (inter) => {
    // 先触发延迟响应
    await inter.deferReply();
    const user = inter.options.getUser('target')

    const embed = new Discord.MessageEmbed()
        .setTitle(`${user.username}'s Avatar`)
        .setColor('#FFA500')
        .setImage(user.displayAvatarURL({
            dynamic: true,
            size: 1024
        }))
        .setTimestamp()
        .setDescription(`[Png](${user.avatarURL({ format: 'png' })}) | [Webp](${user.avatarURL({ dynamic: true })}) | [Jpg](${user.avatarURL({ format: 'jpg' })})`)
        .setFooter(`Requested by: ${inter.user.username}`, inter.user.displayAvatarURL({ dynamic: true }));
    
    await inter.followUp({
        embeds: [embed]
    }); 
}

module.exports.help = {
    name: 'avatar',
}

内容的提问来源于stack exchange，提问作者Vetlix