Full support of the http.FileSystem on all view engines as requested at #1575

Also, the HandleDir accepts both string and http.FileSystem (interface{}) (like the view's fs)

_examples/view/template_jet_3/main.go

@@ -9,8 +9,6 @@ import (
 	"github.com/kataras/iris/v12/view"
 )
 
-// https://github.com/kataras/iris/issues/1443
-
 func main() {
 
 	tmpl := iris.Jet("./views", ".jet")
@@ -44,12 +42,12 @@ func (ViewBuiler) Asset(a view.JetArguments) reflect.Value {
 
 func (ViewBuiler) Style(a view.JetArguments) reflect.Value {
 	path := a.Get(0).String()
-	s := fmt.Sprintf(`<link href="%v" rel="stylesheet"> `, path)
+	s := fmt.Sprintf(`<link href="%v" rel="stylesheet">`, path)
 	return reflect.ValueOf(s)
 }
 
 func (ViewBuiler) Script(a view.JetArguments) reflect.Value {
 	path := a.Get(0).String()
-	s := fmt.Sprintf(`<script src="%v" ></script>`, path)
+	s := fmt.Sprintf(`<script src="%v"></script>`, path)
 	return reflect.ValueOf(s)
 }

_examples/view/template_jet_3/views/index.jet

@@ -1,5 +1,16 @@
 {{ asset("./myasset.mp3")}}
 <br/>
-{{ style("my-stle.css")}}
+{{ style("my-stle.css") | raw}}
 <br/>
-{{ script("my-script.js")}}
+{{ script("my-script.js") | raw}}
+
+<!-- view page source: can't add a link as chrome blocks loading local source, instead
+do that: -->
+
+<code>
+    ./myasset.mp3
+    <br/>
+    &lt;link href="my-stle.css" rel="stylesheet"&gt;
+    <br/>
+    &lt;script src="my-script.js">&lt;/script&gt;
+</code>