为什么 messageReactionAdd 什么都不做 discord.js

Question

I'am trying to code a discord bot with node.js, but i have a problem with messageReactionAdd I don't now why the bot does nothing when i react with an emoji.

My code :

bot.on('messageReactionRemove', (reaction, user) => {
console.log("that work 1");
if(reaction.emoji.name === "white_check_mark") {
    console.log("that work 2");
}})

Answer 1

Events messageReactionAdd and messageReactionRemove working only for cached messages. You need add raw event to your code for trigger any message. https://github.com/AnIdiotsGuide/discordjs-bot-guide/blob/master/coding-guides/raw-events.md

Answer 2

The message must be cached before it will work. Any messages that come in while your bot is open will automatically get cached, but if it's for a specific older message, you can use:

client.channels.get(CHANNELID).fetchMessage(MESSAGEID);

to cache it. After doing this (each time your script is run) you will receive reaction events for that message.

Answer 3

你正在做反应删除，你需要使用 Unicode 表情符号 - 你可以在网上找到这些并复制它们

Answer 4

You should listen to the messageReactionAdd event.
Keep also in mind that ReactionEmoji.name is the Unicode for that emoji: you can get the Unicode symbol by writing a backslash before the emoji, like \\:joy: . The Unicode for :white_check_mark: is ✅.

This should be your code:

bot.on('messageReactionAdd', (reaction, user) => {
  console.log("first check");
  if (reaction.emoji.name === "✅") {
    console.log("second check");
  }
});

This will work on every cached message, if you want it to work only on a specific message, try using Message.awaitReactions() or Message.createReactionCollector()

Answer 5

Update 2022. You may need to add intents for GUILD_MESSAGES and GUILD_MESSAGE_REACTIONS with cache messages to make it work.

Reference: https://discordjs.guide/popular-topics/reactions.html#listening-for-reactions-on-old-messages

const client = new Client({
    intents: [Intents.FLAGS.GUILDS, Intents.FLAGS.GUILD_MESSAGES, Intents.FLAGS.GUILD_MESSAGE_REACTIONS],
    partials: ['MESSAGE', 'CHANNEL', 'REACTION'],
});