diff --git a/runtime/build.go b/runtime/build.go
index 1604e559..0016450d 100644
--- a/runtime/build.go
+++ b/runtime/build.go
@@ -47,6 +47,7 @@ var hasAltPkg = map[string]none{
 	"sync":                     {},
 	"sync/atomic":              {},
 	"syscall":                  {},
+	"syscall/js":               {},
 	"time":                     {},
 	"os":                       {},
 	"os/exec":                  {},
diff --git a/runtime/js/embind/_wrap/emval.cpp b/runtime/internal/embind/_wrap/emval.cpp
similarity index 100%
rename from runtime/js/embind/_wrap/emval.cpp
rename to runtime/internal/embind/_wrap/emval.cpp
diff --git a/runtime/js/embind/embind.go b/runtime/internal/embind/embind.go
similarity index 100%
rename from runtime/js/embind/embind.go
rename to runtime/internal/embind/embind.go
diff --git a/runtime/js/emval.go b/runtime/internal/lib/syscall/js/emval.go
similarity index 98%
rename from runtime/js/emval.go
rename to runtime/internal/lib/syscall/js/emval.go
index 0e53fdab..06029ad8 100644
--- a/runtime/js/emval.go
+++ b/runtime/internal/lib/syscall/js/emval.go
@@ -7,7 +7,7 @@ import (
 	_ "unsafe"
 
 	c "github.com/goplus/llgo/runtime/internal/clite"
-	_ "github.com/goplus/llgo/runtime/js/embind"
+	_ "github.com/goplus/llgo/runtime/internal/embind"
 )
 
 var (
diff --git a/runtime/js/func.go b/runtime/internal/lib/syscall/js/func.go
similarity index 100%
rename from runtime/js/func.go
rename to runtime/internal/lib/syscall/js/func.go
diff --git a/runtime/js/js.go b/runtime/internal/lib/syscall/js/js.go
similarity index 99%
rename from runtime/js/js.go
rename to runtime/internal/lib/syscall/js/js.go
index 40509936..de82b76b 100644
--- a/runtime/js/js.go
+++ b/runtime/internal/lib/syscall/js/js.go
@@ -18,6 +18,9 @@ import (
 	c "github.com/goplus/llgo/runtime/internal/clite"
 )
 
+//llgo:skipall
+type _js struct{}
+
 // Value represents a JavaScript value. The zero value is the JavaScript value "undefined".
 // Values can be checked for equality with the Equal method.
 type Value struct {