node定时发送html格式邮件，带模板引擎编辑动态编辑html

//引用模块
const nodemailer = require("nodemailer");
const schedule = require("node-schedule");
const path = require("path");
const template = require("art-template");
//模板路径
const views = path.join(__dirname, "config", "index.art");

//时间差

async function getDatetime() {
    var date1 = "2022/03/17 00:00:00"; //以往时间
    var date2 = new Date(); //当前时间
    var date3 = date2.getTime() - new Date(date1).getTime(); //时间差的毫秒数
    //计算出相差天数
    var days = Math.floor(date3 / (24 * 3600 * 1000));
    //计算出小时数
    var leave1 = date3 % (24 * 3600 * 1000); //计算天数后剩余的毫秒数
    var hours = Math.floor(leave1 / (3600 * 1000));
    //计算相差分钟数
    var leave2 = leave1 % (3600 * 1000); //计算小时数后剩余的毫秒数
    var minutes = Math.floor(leave2 / (60 * 1000));
    //计算相差秒数
    var leave3 = leave2 % (60 * 1000); //计算分钟数后剩余的毫秒数
    var seconds = Math.round(leave3 / 1000);
    j_content(days);
}

//html模板配置
async function j_content(jdatetime) {
    //const j_days=
    const html = template(views, {
        namea: "你",
        nameb: "她",
        datetime: jdatetime,
        Signature: "xxxxxx",
    });

    j_email(html);
}

//邮箱配置
async function j_email(content) {
    const email = nodemailer.createTransport({
        service: "xxxxxxx@qq.com", //你的邮箱
        secure: true,
        auth: {
            user: "xxxxxxx@qq.com", //你的邮箱
            pass: "自己邮箱账户申请", //你的邮箱授权码
        },
    });

    email.sendMail(
        {
            from: "11949420@qq.com", //你的邮箱
            subject: "久伴私信你",
            to: "xxxxxxx@qq.com", //对方邮箱
            html: content,
        },
        (err, data) => {
            if (err) {
                console.error("发送失败" + err);
            } else {
                console.log("发送成功");
            }
        }
    );
}

//定时发送
async function getTime() {
    var rule = new schedule.RecurrenceRule();
    rule.dayOfWeek = [0, new schedule.Range(1, 6)];
    rule.hour = 21;
    rule.minute = 30;
    var j = schedule.scheduleJob(rule, function () {
        console.log("执行任务");
        getDatetime();
    });
}

getTime();