Get next cron job timing in node-cron

In node-cron, how do I get the timing of the next cron-job? e.g. cronJob.nextCronJob().time, or other properties. There are no methods in the documentation to show this.

Answer

I’m not aware of any way of getting this using the node-cron module. You can do this with the cron module however, using the cronJob.nextDates() function, like so:

const CronJob = require("cron").CronJob;

const cronJob = new CronJob(
    "*/30 * * * * *",
    () => {
        console.log("Timestamp: ", new Date());
    },
    null,
    true
);

setInterval(() => { 
    console.log("Next job time:", cronJob.nextDates().toISOString());
}, 5000);

If you have to use the node-cron module, you could have a look at cron-parser, this will parse a cron expression and give you the next run time(s), e.g.

const parser = require('cron-parser');

const cronExpression = "*/30 * * * * *";
const interval = parser.parseExpression(cronExpression);
console.log('Next run:', interval.next().toISOString());