<script> tags just before the closing
<script src="path/to.js" async></script>
<script src="path/to.js" defer></script>
Deferred scripts are like async scripts, with the exception that the parsing will only be performed once the HTML is fully parsed. Deferred scripts are guaranteed to be loaded in the order of declaration, same way as synchronous scripts.
<noscript> element defines content to be displayed if the user has scripts disabled or if the browser does not support using scripts. The
<noscript> tag can be placed in either the
<head> or the