Example node js scheduler to run jobs at intervals of seconds, minutes and days of weeks

scheduler.js

const CronJob = require('cron').CronJob;
const moment = require('moment-timezone');

const cronJobs = [
        {
            cronTime: "*/20 * * * * *",
            job: function (){
              console.log("Twenty seconds job has run");
            }
        },
        {
            cronTime: '00 */2 * * * *',
            job: function (){
              console.log("Two minutes job has run");
            }
        },

        {
            cronTime: "00 */3 * * * *",
            job: function (){
              console.log("Three minutes job has run");

            }
        },

        {
            cronTime: "00 */5 * * * *",
            job: function (){
              console.log("Five minutes job has run");
            }
        },

        {
            cronTime: "00 00 9 * * 1",
            job: function (){
              console.log("Monday 7 am job has run");
            }
        },

        {
            cronTime: "00 00 9 * * 3",
            job: function (){
              console.log("Wednesday 9 am job has run");
            }
        },

        {
            cronTime: "00 00 14 * * 4",
            job: function (){
              console.log("Thursday 2 pm job has run");
            }
        },
    ];


cronJobs.forEach(function (cj) {
    var job = new CronJob({
      cronTime: cj.cronTime,
      onTick: cj.job,
      start: false,
      timeZone: 'America/Los_Angeles'
    });
    job.start();
});