Move html/head/navbar into elements.

examples/helloworld/Makefile

@@ -1,29 +1,11 @@
-GO := $(shell which go)
-GO112_VERSION := 1.12.16
-GO112 := go${GO112_VERSION}
-
 GOPHERJS := $(shell which gopherjs 2> /dev/null)
 
 ## start-web       : Starts GopherJS serving.
 start-web:
-	GOPHERJS_GOROOT="${HOME}/sdk/${GO112}" ${GOPHERJS} serve . -v
-
-## prepare         : Installs Go 1.12 and GopherJS. Go must be already installed.
-prepare: prepare-go prepare-gopherjs
-
-## prepare-go      : Prepares specific Go tooling for GopherJS. Go must be already installed.
-prepare-go:
-	@echo "* Getting Go 1.12.16 (required by gopherjs)"
-	@${GO} get golang.org/dl/${GO112}
-	@${GO112} download
-
-## prepare-gopherjs: Prepares GopherJS (e.g. compiles it).
-prepare-gopherjs:
-	@echo "* Getting gopherjs..."
-	@${GO112} get -u -v github.com/gopherjs/gopherjs
+	${GOPHERJS} serve . -v
 
 help : Makefile
 	@echo "helloworld Makefile available subcommands:\n"
 	@sed -n 's/^## //p' $<
 
-.DEFAULT_GOAL := help
+.DEFAULT_GOAL := help

examples/helloworld/main.go

@@ -28,7 +28,6 @@ import (
 	"go.dev.pztrn.name/bulpherjs"
 	"go.dev.pztrn.name/bulpherjs/common"
 	"go.dev.pztrn.name/bulpherjs/elements"
-	"go.dev.pztrn.name/bulpherjs/widgets"
 )
 
 func main() {
@@ -45,7 +44,7 @@ func main() {
 }
 
 func start(a *bulpherjs.Application) {
-	nb := widgets.NewNavBar(&widgets.NavBarOptions{
+	nb := elements.NewNavBar(&elements.NavBarOptions{
 		IsDark: true,
 		Title:  "Example application",
 	})