placed directly before a document’s closing
<script src="script/transitions.js"></script> </body> </html>
Content Delivery Networks
Web servers are gradually upgrading to a new version of the HTTP protocol, HTTP/2, which includes a number of improvements to performance. Specifically, HTTP/2 will allow multiplexing, or the ability to send multiple requests over a single TCP connection, which may actually obviate the need for concatenation and other HTTP/1-specific hacks.