From a5eb1b84ab48b32e81fd604f3fa2a17835ee71e0 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Wed, 16 May 2018 22:10:35 +0900
Subject: [PATCH] web: Better way to detect NodeJS

---
 internal/web/js.go | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/internal/web/js.go b/internal/web/js.go
index d4ce5fff2..aacb6ea7a 100644
--- a/internal/web/js.go
+++ b/internal/web/js.go
@@ -18,12 +18,21 @@ package web
 
 import (
 	"strings"
+	"sync"
 
 	"github.com/gopherjs/gopherjs/js"
 )
 
+var (
+	isNodeJSOnce sync.Once
+	isNodeJS     = false
+)
+
 func IsNodeJS() bool {
-	return js.Global.Get("require") != js.Undefined
+	isNodeJSOnce.Do(func() {
+		isNodeJS = js.Global.Get("process") != js.Undefined
+	})
+	return isNodeJS
 }
 
 func IsBrowser() bool {