How to insert a script tag dynamically

Say you need to include a regular ol’ script tag in a template file based on a global variable being set or not. Well, here’s a snippett you can use.

<script type="text/javascript">
if (window.libName) {
    const script = document.createElement('script')
    script.src = "https://cdn.com/js/lib-" + window.libName +     ".min.js"
    document.body.appendChild(script);
}
</script>

This will add a script tag with a src value that is produced by combining a value from window.libName and combining it with .min.js to create the proper path needed. After this is done, the script tag is loaded into the document using appendChild.