docs(examples): add js helpers go example

Author: akshayganeshen

docs/examples/js/main.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/akshayganeshen/napi-go"
+	"github.com/akshayganeshen/napi-go/entry"
+	"github.com/akshayganeshen/napi-go/js"
+)
+
+func init() {
+	entry.Export("getMap", GetMapHandler)
+	entry.Export("getCallback", js.AsCallback(GetCallback))
+	entry.Export("getArray", js.AsCallback(GetArray))
+	entry.Export("getPromiseResolve", js.AsCallback(GetPromiseResolve))
+	entry.Export("getPromiseReject", js.AsCallback(GetPromiseReject))
+}
+
+func GetMapHandler(env napi.Env, info napi.CallbackInfo) napi.Value {
+	jsEnv := js.AsEnv(env)
+
+	return jsEnv.ValueOf(
+		map[string]any{
+			"string":    "hello world",
+			"number":    123,
+			"bool":      false,
+			"undefined": jsEnv.Undefined(),
+			"null":      nil,
+			"function": jsEnv.FuncOf(
+				func(env js.Env, this js.Value, args []js.Value) any {
+					return "hello world"
+				},
+			),
+		},
+	).Value
+}
+
+func GetCallback(env js.Env, this js.Value, args []js.Value) any {
+	return func(env js.Env, this js.Value, args []js.Value) any {
+		return map[string]any{
+			"this": this,
+			"args": args,
+		}
+	}
+}
+
+func GetArray(env js.Env, this js.Value, args []js.Value) any {
+	return []any{
+		"hello world",
+		123,
+		true,
+		map[string]any{
+			"key": "value",
+		},
+	}
+}
+
+func GetPromiseResolve(env js.Env, this js.Value, args []js.Value) any {
+	promise := env.NewPromise()
+
+	go func() {
+		time.Sleep(time.Second)
+		promise.Resolve("resolved")
+	}()
+
+	return promise
+}
+
+func GetPromiseReject(env js.Env, this js.Value, args []js.Value) any {
+	promise := env.NewPromise()
+
+	go func() {
+		time.Sleep(time.Second)
+		promise.Reject(fmt.Errorf("rejected"))
+	}()
+
+	return promise
+}
+
+func main() {}

makefile

@@ -6,7 +6,8 @@ EXAMPLE_PACKAGES = \
 	async-promise \
 	callback \
 	describe-args \
-	hello-world
+	hello-world \
+	js
 
 NAPI_LIB_SUFFIX = .node