js 自调函数
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>自调函数</title>
</head>
<body>
<script>
(function demo() {
console.log('啊，我被调用了');
})();
(function(){
console.log('啊，我也被调用了')
})()
</script>
</body>
</html>
