fdrobidoux

let subscribers = {};

module.exports = {
    publish(event, data) {
        if (!subscribers[event]) return;

        subscribers.forEach(callback => {
            callback(data);
        })
    },

fdrobidoux

<?php
/*
 * Add this code to your theme's functions.php file
 */
 
// Theme activation
add_action("after_switch_theme", "theme_activated");
function theme_activation_hook(){
    error_log('theme activated');
}