aloerina01/sample.html

## sample.html
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <script>
      (function() {
        if (!conditions) { // 条件は省略
            return;
        }

        // 1. create iframe to load a library
        var iframe = document.createElement('iframe');
        var head = document.getElementsByTagName('head')[0];
        head.appendChild(iframe);

        // 2. some functions after loading a library
        iframe.onload = function() {
            // 後続処理は省略
        }

        // 3. write sctipt tag in iframe
        var html = '<body><script src="//scdn.hogehoge.com/library.js"><\/script><\/body>';
        var iframeDocument = iframe.contentWindow.document;
        iframeDocument.open();
        iframeDocument.write(html);
        iframeDocument.close();
      })();
  </script>
</head>
<body>
    <!-- 省略 -->
</body>
</html>
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<script>
	(function() {
	if (!conditions) { // 条件は省略
	return;
	}

	// 1. create iframe to load a library
	var iframe = document.createElement('iframe');
	var head = document.getElementsByTagName('head')[0];
	head.appendChild(iframe);

	// 2. some functions after loading a library
	iframe.onload = function() {
	// 後続処理は省略
	}

	// 3. write sctipt tag in iframe
	var html = '<body><script src="//scdn.hogehoge.com/library.js"><\/script><\/body>';
	var iframeDocument = iframe.contentWindow.document;
	iframeDocument.open();
	iframeDocument.write(html);
	iframeDocument.close();
	})();
	</script>
	</head>
	<body>
	<!-- 省略 -->
	</body>
	</html>