响应 discord.js 中的消息

Question

I would like to send a message "E" to the channel where someone sent a message starting with s#. I have got 2 problems:

1. I have got a function:

function read(msg)
{
  if(msg[0] === "s" && msg[1] === "#") console.log("E");
}

and I don't know how to call this function with a message that someone sent as 'msg'.

2. And when I figure out how to do this, I would like to add a channel.send("E"); , but I don't know how to get the id of the channel that the message was sent to.

Answer 1

client.on('message', message => {
    if(message.content.startsWith('s#')) console.log('s#');//check if the message starts with s#
});

message.channel.send('this is a reply to the message sent in this channel');

see docs: https://discord.js.org/#/docs/main/stable/class/Client?scrollTo=e-message

Edit (the whole code with the read function):

const Discord = require('discord.js');
const client = new Discord.Client();

client.on('message', message => {
    read(message);
});

function read(message){
   if(message.content.startsWith('s#')) console.log('s#');
}

client.login('your-token-here');

Answer 2

If you want to use the read function there two ways

As @SickBoy Said,

function read(msg){
if(msg.content.startsWith('s#'){
return true;
}
else{
return false;
}
}

or else,

function read(msg){
const data = msg.content.split('')
if(data[0] === 's' && data[1] === '#'){
return true;
}
else{
return false;
}
}

To call this function simply add a event of message.

client.on('message' , message=> {
const res = read(message)
if(res){
//The message starts with s#
}
else{
//It doesn't start with s#
}
})

Answer 3

There is an event called message which gets emitted whenever someone sends a message in the server. This event returns a message object which contains all the information about that message like content, author, channel, member, etc. So to send something back as a reply you can do this:

client.on('message', message => {
    if (message.content.startsWith('s#')) {
        message.channel.send('E');
    }
}

Also, I saw you're doing this in your ready function: msg[0] . This is not how you access the content of a message object. It's not an array. You can get the content of a message using let text = message.content . This text is of string type and stores the message text.