html - Can we load different external links if the screen width is too small? -

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i know if can load different external ressources (such jquery) depending on screen width, know can do

<link rel="stylesheet" media="screen , (min-device-width: 800px)" href="mobile.css" />

but can 

<script media =" screen , (min-device-width: 800px)" src="https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js"></script>

i not think works css. works follows:

if (document.documentelement.clientwidth < 800) {     $.getscript('https://ajax.googleapis.com/ajax/libs/jquerymobile/1.4.5/jquery.mobile.min.js'); }

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