index.html

<!DOCTYPE html>
<html lang="de">
<head>
    <meta charset="UTF-8">
    <title>Demo</title>
    <script src="worker_lib.js"></script>
</head>
<body>
<script>
    let work = new AsyncWorker({
        sayHello: helloFunction,
        changeNameTo: function(newName) {
        	this.your_name = newName;
        	return true;
		},
        your_name: 'unknown'
	});

	function helloFunction(name) {
		console.info("Hello", this.your_name, "from", name);
	}


    console.debug("Worker:", work);

    work.your_name = "Genius";
    //work.changeNameTo("Jochen").then(function() {
		console.log("Your Name is:", work.your_name);
		work.sayHello("Someone").catch(function (error) {
			console.error("ERROR:", error);
		});
	//}).catch(function (error) { console.error("ERROR:", error); });
</script>
</body>
</html>