diff --git a/html_template/page.go b/html_template/page.go
new file mode 100644
index 0000000..25696aa
--- /dev/null
+++ b/html_template/page.go
@@ -0,0 +1,31 @@
+package HTMLTemplate
+
+type Page interface {
+	GetVersion() string
+	GetLayout() string
+	GetPage() string
+	GetData() any
+}
+
+type SimplePage struct {
+	Version string
+	Layout  string
+	Page    string
+	Data    any
+}
+
+func (s SimplePage) GetVersion() string {
+	return s.Version
+}
+
+func (s SimplePage) GetLayout() string {
+	return s.Layout
+}
+
+func (s SimplePage) GetPage() string {
+	return s.Page
+}
+
+func (s SimplePage) GetData() any {
+	return s.Data
+}
diff --git a/html_template/pkg.go b/html_template/pkg.go
new file mode 100644
index 0000000..4140f89
--- /dev/null
+++ b/html_template/pkg.go
@@ -0,0 +1,158 @@
+package HTMLTemplate
+
+import (
+	// External
+	werr "git.gibonuddevalla.se/go/wrappederror"
+
+	// Standard
+	"fmt"
+	"html/template"
+	"io/fs"
+	"net/http"
+	"os"
+	"regexp"
+)
+
+type Engine struct {
+	parsedTemplates    map[string]*template.Template
+	viewFS             fs.FS
+	staticEmbeddedFS   http.Handler
+	staticLocalFS      http.Handler
+	componentFilenames []string
+	DevMode            bool
+}
+
+func NewEngine(viewFS, staticFS fs.FS, devmode bool) (e Engine, err error) { // {{{
+	e.parsedTemplates = make(map[string]*template.Template)
+	e.viewFS = viewFS
+	e.DevMode = devmode
+
+	e.componentFilenames, err = e.getComponentFilenames()
+
+	// Set up fileservers for static resources.
+	// The embedded FS is using the embedded files intented for production use.
+	// The local FS is for development of Javascript to avoid server rebuild (devmode).
+	var staticSubFS fs.FS
+	staticSubFS, err = fs.Sub(staticFS, "static")
+	if err != nil {
+		return
+	}
+	e.staticEmbeddedFS = http.FileServer(http.FS(staticSubFS))
+	e.staticLocalFS = http.FileServer(http.Dir("static"))
+
+	return
+} // }}}
+
+func (e *Engine) getComponentFilenames() (files []string, err error) { // {{{
+	files = []string{}
+	if err := fs.WalkDir(e.viewFS, "views/components", func(path string, d fs.DirEntry, err error) error {
+		if d == nil {
+			return nil
+		}
+		if d.IsDir() {
+			return nil
+		}
+		files = append(files, path)
+		return nil
+	}); err != nil {
+		return nil, err
+	}
+
+	return files, nil
+} // }}}
+
+func (e *Engine) ReloadTemplates() { // {{{
+	e.parsedTemplates = make(map[string]*template.Template)
+} // }}}
+
+func (e *Engine) StaticResource(w http.ResponseWriter, r *http.Request) { // {{{
+	var err error
+
+	// URLs with pattern /(css|images)/v1.0.0/foobar are stripped of the version.
+	// To get rid of problems with cached content in browser on a new version release,
+	// while also not disabling cache altogether.
+	if r.URL.Path == "/favicon.ico" {
+		e.staticEmbeddedFS.ServeHTTP(w, r)
+		return
+	}
+
+	rxp := regexp.MustCompile("^/(css|images|js|fonts)/v[0-9]+/(.*)$")
+	if comp := rxp.FindStringSubmatch(r.URL.Path); comp != nil {
+		w.Header().Add("Pragma", "public")
+		w.Header().Add("Cache-Control", "max-age=604800")
+
+		r.URL.Path = fmt.Sprintf("/%s/%s", comp[1], comp[2])
+		if e.DevMode {
+			p := fmt.Sprintf("static/%s/%s", comp[1], comp[2])
+			_, err = os.Stat(p)
+			if err == nil {
+				e.staticLocalFS.ServeHTTP(w, r)
+			}
+			return
+		}
+	}
+
+	e.staticEmbeddedFS.ServeHTTP(w, r)
+} // }}}
+func (e *Engine) getPage(layout, page string) (tmpl *template.Template, err error) { // {{{
+	layoutFilename := fmt.Sprintf("views/layouts/%s.gotmpl", layout)
+	pageFilename := fmt.Sprintf("views/pages/%s.gotmpl", page)
+
+	if tmpl, found := e.parsedTemplates[page]; found {
+		return tmpl, nil
+	}
+
+	funcMap := template.FuncMap{
+		/*
+			"format_time": func(t time.Time) template.HTML {
+				return template.HTML(
+					t.In(smonConfig.Timezone()).Format(`<span class="date">2006-01-02</span> <span class="time">15:04:05<span class="seconds">:05</span></span>`),
+				)
+			},
+		*/
+	}
+
+	filenames := []string{layoutFilename, pageFilename}
+	filenames = append(filenames, e.componentFilenames...)
+
+	if e.DevMode {
+		tmpl, err = template.New(layout+".gotmpl").Funcs(funcMap).ParseFS(os.DirFS("."), filenames...)
+	} else {
+		tmpl, err = template.New(layout+".gotmpl").Funcs(funcMap).ParseFS(e.viewFS, filenames...)
+	}
+	if err != nil {
+		err = werr.Wrap(err).Log()
+		return
+	}
+
+	e.parsedTemplates[page] = tmpl
+	return
+} // }}}
+func (e *Engine) Render(p Page, w http.ResponseWriter, r *http.Request) (err error) { // {{{
+	if e.DevMode {
+		e.ReloadTemplates()
+	}
+
+	var tmpl *template.Template
+	tmpl, err = e.getPage(p.GetLayout(), p.GetPage())
+	if err != nil {
+		err = werr.Wrap(err)
+		return
+	}
+
+	data := map[string]any{
+		"VERSION": p.GetVersion(),
+		"LAYOUT":  p.GetLayout(),
+		"PAGE":    p.GetPage(),
+		"ERROR":   r.URL.Query().Get("_err"),
+		"Data":    p.GetData(),
+	}
+
+	err = tmpl.Execute(w, data)
+	if err != nil {
+		err = werr.Wrap(err)
+	}
+	return
+} // }}}
+
+// vim: foldmethod=marker