我正试图使用Nodemailer让Discord机器人根据信息向某些人发送电子邮件。我使用变量来选择向谁发送电子邮件。每当我尝试使用它时，它都无法发送电子邮件，并表示变量未定义。这是我的代码：
const Discord = require('discord.js');
const client = new Discord.Client();
var nodemailer = require('nodemailer');
var transporter = nodemailer.createTransport({
service: 'gmail',
auth: {
user: 'user',
pass: 'pass'
}
});
var mailOptions = {
from: 'someemail@gmail.com',
to: firstname + "." + lastname + "@gmail.com",
subject: 'Sending Email using Node.js',
text: 'That was easy!'
};
var firstname = "";
var lastname = "";
var chat = 0;
var placeholder = "";
client.on("message", message => {
var prefix = '!';
if (message.content.startsWith(prefix + "chat") && chat == 0) {
chat = chat + 1;
message.channel.send("Welcome! I am Sabrina, a friendly chatbot. By the way, what is your first name?");
} else if (message.content.startsWith(prefix + "chat") && chat == 1) {
chat = chat + 1;
placeholder = message.content;
firstname = placeholder.replace("!chat ", "");
message.channel.send("Very intresting name, " + firstname + ".
What is your last name?");
transporter.sendMail(mailOptions, function(error, info){
if (error) {
console.log(error);
} else {
console.log('Email sent: ' + info.response);
}
}
});
}
});
client.login("Token")
var mailOptions = {
from: 'someemail@gmail.com',
to: firstname + "." + lastname + "@gmail.com",
subject: 'Sending Email using Node.js',
text: 'That was easy!'
};
这个部分在解析时进行评估，在代码的其余部分运行之前，也就是在firstname和lastname被填充(甚至初始化为""(之前。它不会随着这些变量的变化而动态更新。
既然你想动态地构造mailOptions，为什么不制作一个函数来实现它呢？
// Traditional syntax
function getMailOptions(first, last) {
return {
from: 'someemail@gmail.com',
to: first + "." + last + "@gmail.com",
subject: 'Sending Email using Node.js',
text: 'That was easy!'
}
}
// Or, since you're using arrow functions..
const getMailOptions = (first, last) => ({
from: 'someemail@gmail.com',
to: first + "." + last + "@gmail.com",
subject: 'Sending Email using Node.js',
text: 'That was easy!'
});
现在你可以使用它了：
transporter.sendMail(getMailOptions(firstname, lastname), function(error, info){
/* ... */