snigo/kiss-01-everything_is_event-01-add_event_listener.js

## kiss-01-everything_is_event-01-add_event_listener.js
const button = document.getElementById('btn');

function handleClick(clickEvent) {
  /** React on click event */
}

button.addEventListener('click', handleClick);
	const button = document.getElementById('btn');

	function handleClick(clickEvent) {
	/** React on click event */
	}

	button.addEventListener('click', handleClick);