如何正确使用MessageEmbed？解决其非构造函数报错问题

我在用discord.js开发Discord机器人时遇到了TypeError: MessageEmbed is not a constructor错误，报错堆栈如下：

TypeError: MessageEmbed is not a constructor
    at Client.<anonymous> (C:\Users\patry\Desktop\MythicBot\index.js:34:21)
    at Client.emit (node:events:512:28)
    at MessageCreateAction.handle (C:\Users\patry\Desktop\MythicBot\node_modules\discord.js\src\client\actions\MessageCreate.js:28:14)
    at module.exports [as MESSAGE_CREATE] (C:\Users\patry\Desktop\MythicBot\node_modules\discord.js\src\client\websocket\handlers\MESSAGE_CREATE.js:4:32)
    at WebSocketManager.handlePacket (C:\Users\patry\Desktop\MythicBot\node_modules\discord.js\src\client\websocket\WebSocketManager.js:355:31)
    at WebSocketManager.<anonymous> (C:\Users\patry\Desktop\MythicBot\node_modules\discord.js\src\client\websocket\WebSocketManager.js:239:12)
    at WebSocketManager.emit (C:\Users\patry\Desktop\MythicBot\node_modules\@vladfrangu\async_event_emitter\dist\index.js:282:31)
    at WebSocketShard.<anonymous> (C:\Users\patry\Desktop\MythicBot\node_modules\@discordjs\ws\dist\index.js:1173:51)
    at WebSocketShard.emit (C:\Users\patry\Desktop\MythicBot\node_modules\@vladfrangu\async_event_emitter\dist\index.js:282:31)
    at WebSocketShard.onMessage (C:\Users\patry\Desktop\MythicBot\node_modules\@discordjs\ws\dist\index.js:988:14)
Emitted 'error' event on Client instance at:
    at emitUnhandledRejectionOrErr (node:events:393:10)
    at process.processTicksAndRejections (node:internal/process/task_queues:84:21)

我的代码：

const { Client, GatewayIntentBits, MessageEmbed } = require('discord.js');
const Discord = require('discord.js');
const client = new Client({
  intents: [
    GatewayIntentBits.Guilds,
    GatewayIntentBits.GuildMessages,
    GatewayIntentBits.MessageContent,
    GatewayIntentBits.GuildMembers,
  ],
});
const prefix = '$'; // Możesz dostosować prefix komendy
client.on('messageCreate', async (message) => {
  if (message.content.startsWith(prefix)) {
    const args = message.content.slice(prefix.length).trim().split(/ +/);
    const command = args.shift().toLowerCase();

    if (command === 'wyslij') {
      // Sprawdź, czy użytkownik podał odpowiednie argumenty
      if (args.length < 3) {
        return message.reply('Za mało argumentów. Użyj: $wyslij IDkanalu Tresc Kolor');
      }

      const channelID = args[0];
      const content = args[1];
      const color = args[2].toLowerCase(); // Przekonwertuj kolor na małe litery

      // Sprawdź, czy kanał istnieje
      const channel = client.channels.cache.get(channelID);
      if (!channel) {
        return message.reply('Podany kanał nie istnieje.');
      }

      // Stwórz wiadomość embed
      const embed = new MessageEmbed()
        .setColor(color)
        .setDescription(content);

      // Wyślij wiadomość embed na wskazany kanał
      channel.send(embed);
    }
  }
});

错误原因 #

你的代码使用的是Discord.js v14版本，这个版本里**MessageEmbed已被移除**，取而代之的是EmbedBuilder。原有的MessageEmbed构造函数不再存在，因此会抛出“不是构造函数”的错误。

修复步骤 #

• 修改导入语句：把原来导入的MessageEmbed替换成EmbedBuilder
• 替换实例化代码：将new MessageEmbed()改为new EmbedBuilder()
• 调整发送逻辑：v14中channel.send()不再直接接受Embed实例，需要放在embeds数组中传递，比如channel.send({ embeds: [embed] })

修复后的完整代码 #

const { Client, GatewayIntentBits, EmbedBuilder } = require('discord.js');
const client = new Client({
  intents: [
    GatewayIntentBits.Guilds,
    GatewayIntentBits.GuildMessages,
    GatewayIntentBits.MessageContent,
    GatewayIntentBits.GuildMembers,
  ],
});
const prefix = '$'; // Możesz dostosować prefix komendy
client.on('messageCreate', async (message) => {
  if (message.content.startsWith(prefix)) {
    const args = message.content.slice(prefix.length).trim().split(/ +/);
    const command = args.shift().toLowerCase();

    if (command === 'wyslij') {
      // Sprawdź, czy użytkownik podał odpowiednie argumenty
      if (args.length < 3) {
        return message.reply('Za mało argumentów. Użyj: $wyslij IDkanalu Tresc Kolor');
      }

      const channelID = args[0];
      const content = args[1];
      const color = args[2].toLowerCase(); // Przekonwertuj kolor na małe litery

      // Sprawdź, czy kanał istnieje
      const channel = client.channels.cache.get(channelID);
      if (!channel) {
        return message.reply('Podany kanał nie istnieje.');
      }

      // Stwórz wiadomość embed
      const embed = new EmbedBuilder()
        .setColor(color)
        .setDescription(content);

      // Wyślij wiadomość embed na wskazany kanał
      channel.send({ embeds: [embed] });
    }
  }
});

额外说明 #

Discord.js v14对构建类做了统一调整，所有用于构建消息、嵌入、组件的类都统一命名为XXXBuilder（比如EmbedBuilder、SlashCommandBuilder等），目的是让API更清晰一致。

内容的提问来源于stack exchange，提问作者Njewiem