JS-Code in fetch_basecamp/02_step/01_call_resource.php

// Get the Button
let btn = document.getElementById("call_fetch_btn");

// Add an event listener to the button
btn.addEventListener("click", wakeUpFetch);

function wakeUpFetch() {
	// The fetch() spaghetti meal starts ...
	// The 1st parameter for fetch() is an URL or a path to the resource
	fetch("resources/01_resource.php");
}