{{ $main := resources.Get "js/main.js" }}
{{ $bootstrap := resources.Get "js/bootstrap.bundle.min.js" }}
{{ $secureJS := slice $main $bootstrap | resources.Concat "bundle.js" | resources.Minify }}
<script src="{{ $secureJS.RelPermalink }}"></script>

{{ range $val := $.Site.Params.customJS }}
{{ if gt (len $val) 0 }}
<script src="{{ $val }}"></script>
{{ end }}
{{ end }}