If you need to load javascript by the case like domain name, following code solve your pain point.
Example 1) Loading script by the screen width
function addJavascript(jsname) { var th = document.getElementsByTagName('head')[0]; var s = document.createElement('script'); s.setAttribute('type','text/javascript'); s.setAttribute('src',jsname); th.appendChild(s); } if (screen.width > 500) { addJavascript("your_domain/js/jquery_computer.js"); } else { addJavascript("your_domain/js/mobile_version.js"); }
Example 2) Loading Google Adsense script by the domain name
This is what actually I use for confluence having multiple space in different domain name.
<!-- Global site tag (gtag.js) - Google Analytics --> <script> function addJavascript(jsname) { var th = document.getElementsByTagName('head')[0]; var s = document.createElement('script'); s.setAttribute('type','text/javascript'); s.setAttribute('src',jsname); th.appendChild(s); } var sUA = "your default User Agent ID"; if (document.domain.toLowerCase()=="enewtown.com") sUA="UA-******-17"; else sUA="UA-*******-16"; addJavascript( "https://www.googletagmanager.com/gtag/js?id=" + sUA); window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', sUA); </script>