add a readme, missing build tags, fix old code; addresses #4

README.md

@@ -0,0 +1,42 @@
+# Go DOM binding (and more) for WebAssembly
+
+This library provides a Go API for different Web APIs for WebAssembly target.
+
+It's in an active development, but an API will be carefully versioned to
+avoid breaking users.
+Use Go dependency management tools to lock a specific version.
+
+**Features:**
+
+- Better JS API (wrappers for `syscall/js`)
+- Basic DOM manipulation, styles, events
+- Input elements
+- SVG elements and transforms
+- `LocalStorage` and `SessionStorage`
+- Extension APIs (tested on Chrome):
+    - Native Messaging
+    - Bookmarks
+    - Tabs
+- `net`-like library for WebSockets
+    - Tested with gRPC
+- `wasm-server` for fast prototyping
+
+## Quickstart
+
+Pull the library and install `wasm-server` (optional):
+
+```
+go get -u github.com/dennwc/dom
+go install github.com/dennwc/dom/cmd/wasm-server
+```
+
+Run an example app:
+
+```
+cd $GOPATH/src/github.com/dennwc/dom
+wasm-server
+```
+
+Check result: http://localhost:8080/
+
+The source code is recompiled on each page refresh, so feel free to experiment!

extension/chrome/bookmarks.go

@@ -1,3 +1,5 @@
+//+build js
+
 package chrome
 
 import "github.com/dennwc/dom/js"
@@ -33,7 +35,7 @@ func (b jsBookmarks) callAsync(name string, args ...interface{}) js.Value {
 	cb := js.NewEventCallback(func(v js.Value) {
 		ch <- v
 	})
-	defer cb.Close()
+	defer cb.Release()
 	args = append(args, cb)
 	b.v.Call(name, args...)
 	return <-ch

extension/chrome/chrome.go

@@ -1,3 +1,5 @@
+//+build js
+
 package chrome
 
 import "github.com/dennwc/dom/js"

extension/chrome/tabs.go

@@ -1,3 +1,5 @@
+//+build js
+
 package chrome
 
 import "github.com/dennwc/dom/js"
@@ -26,7 +28,7 @@ func (t jsTabs) callAsync(name string, args ...interface{}) js.Value {
 	cb := js.NewEventCallback(func(v js.Value) {
 		ch <- v
 	})
-	defer cb.Close()
+	defer cb.Release()
 	args = append(args, cb)
 	t.v.Call(name, args...)
 	return <-ch

js/bytes.go

@@ -1,3 +1,5 @@
+//+build wasm
+
 package js
 
 import (

js/errors.go

@@ -1,3 +1,5 @@
+//+build wasm
+
 package js
 
 type Error struct {

js/funcs.go

@@ -1,3 +1,5 @@
+//+build wasm
+
 package js
 
 import (

js/js.go

@@ -1,3 +1,6 @@
+//+build wasm
+
+// Package JS provides additional functionality on top of syscall/js package for WASM.
 package js
 
 import (

storage/common.go

@@ -0,0 +1,16 @@
+package storage
+
+type Storage interface {
+	// Length returns an integer representing the number of data items stored in the Storage object.
+	Length() int
+	// Key will return the name of the nth key in the storage.
+	Key(ind int) string
+	// GetItem will return that key's value.
+	GetItem(key string) (string, bool)
+	// SetItem will add that key to the storage, or update that key's value if it already exists.
+	SetItem(key, val string)
+	// RemoveItem will remove that key from the storage.
+	RemoveItem(key string)
+	// Clear will empty all keys out of the storage.
+	Clear()
+}

storage/storage.go

@@ -1,24 +1,11 @@
+//+build js
+
 package storage
 
 import (
 	"syscall/js"
 )
 
-type Storage interface {
-	// Length returns an integer representing the number of data items stored in the Storage object.
-	Length() int
-	// Key will return the name of the nth key in the storage.
-	Key(ind int) string
-	// GetItem will return that key's value.
-	GetItem(key string) (string, bool)
-	// SetItem will add that key to the storage, or update that key's value if it already exists.
-	SetItem(key, val string)
-	// RemoveItem will remove that key from the storage.
-	RemoveItem(key string)
-	// Clear will empty all keys out of the storage.
-	Clear()
-}
-
 func getStorage(name string) Storage {
 	s := js.Global().Get("window").Get(name)
 	if s == js.Null() || s == js.Undefined() {

svg/svg.go

@@ -1,3 +1,5 @@
+//+build wasm
+
 package svg
 
 import (