What are the advantages and disadvantages of using a JavaScript function versus a Cronjob for this task?

The issue is automating a task, such as sending out daily email reminders. One option is to use a JavaScript function that runs on the client-side at a specific time each day. Another option is to use a Cronjob, which is a time-based job scheduler in Unix-like operating systems that can run scripts or commands at specified intervals. Using a JavaScript function for this task can be advantageous because it is easier to implement and does not require access to the server. However, it may not be as reliable as a Cronjob since it relies on the client's device being online and the browser being open. Cronjobs, on the other hand, are more reliable and can run even if the user's device is offline. However, setting up a Cronjob requires access to the server and knowledge of Unix commands.

// Implementing a Cronjob for sending out daily email reminders
// Add this line to your crontab file to run the script every day at 9am
// 0 9 * * * /usr/bin/php /path/to/your/script.php

// script.php
<?php
// Code to send out email reminders
?>