samples/maybe.html

<!DOCTYPE html>
<html>
<head>
	<title>Maybe</title>

	<script type="text/javascript" src="../node_modules/requirejs/require.js"></script>

	<script type="text/javascript">
		require.config({
			packages: [
				{
					name: "requirejs-dplugins",
					location: ".."
				},
				{
					name: "modules",
					location: "./modules"
				}
			],
		});
	</script>

	<script type="text/javascript">
		var dep = Math.random() < 0.5 ? "maybe" : "missingModule";
		require([
			"requirejs-dplugins/maybe!modules/"+dep
		], function (dep) {
			if (dep === undefined) {
				dep = {
					msg: "No module found."
				}
			}
			document.getElementById("box").innerHTML = dep.msg;
		});
	</script>

	<style>
		#box {
			font-size: 110%;
			border: 2px solid black;
			margin: auto;
			margin-top: 12em;
			padding: 3em;
			width: 50em;
			text-align: center;
		}
	</style>

</head>
<body>
<div id="box"></div>
</body>
</html>