無名関数の使用方法

<!DOCTYPE html>
<html>
<head>
<meta content="width=device-width initial-scale=1.0 minimum-scale=1.0 maximum-scale=1.0 user-scalable=no" name="viewport">
<meta charset="UTF-8">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.1.1/css/bootstrap.css">
 
<style>
</style>
 
<script>
// jQuery
$(function(){});
 
// API
setTimeout(function(){}, 1000);
 
// 関数定義と同じ
var test = function(){};
 
// 無名関数の実行
(funcion(){})():
</script>
 
</head>
<body>
 
 
</body>
</html>