How can I start the job immediately and after run on a interval

[tungrix]

Now, if I run the below script, the function will run after 5 seconds, instead of calling the function once before creating the Cronjob, is there any other way to run the function at the beginning first and then run every 5 seconds?

import { CronJob } from 'cron';

const job = new CronJob(
	'*/5 * * * * *', // cronTime
	function () {
		console.log('You will see this message every 5 second');
	}, // onTick
	null, // onComplete
	true, // start
	'America/Los_Angeles' // timeZone
);

[sheerlox]

As specified in the API documentation, you can use the runOnInit option to meet that requirement:

import { CronJob } from 'cron';

const job = new CronJob(
  '*/5 * * * * *', // cronTime
  function () {
    console.log('You will see this message every 5 second');
  }, // onTick
  null, // onComplete
  true, // start
  'America/Los_Angeles', // timeZone
  null, // context
  true // runOnInit
);

On a side note, because it is more explicit and does not care about the order of options, I would recommend using the CronJob.from() static method to declare your jobs:

import { CronJob } from 'cron';

const job = CronJob.from({
  cronTime: '*/5 * * * * *',
  onTick: function () {
    console.log('You will see this message every 5 second');
  },
  start: true,
  timeZone: 'America/Los_Angeles',
  runOnInit: true
});

[tungrix]

import { CronJob } from "cron";

const creditRateJob = new CronJob.from({
  cronTime: "*/5 * * * * *",
  onTick: updateCreditRate,
  start: true,
  timeZone: "America/Los_Ang/eles",
  runOnInit: true,
});

When I ran the above code, I got the following error:

const creditRateJob = new CronJob.from({
                       ^
TypeError: CronJob.from is not a constructor

I think the constructor method new needs to be removed. Thank you

[sheerlox]

Indeed I forgot to remove it after copy-pasting, thanks for pointing this out, updated my answer!

[tungrix]

Thank you very much, especially for the side note, very helpful!