How pointers works with primitives vs objects in v8go

v8_values.go

package main

import (
	"fmt"

	v8 "rogchap.com/v8go"
)

func main() {
	iso := v8.NewIsolate()
	ctx1 := v8.NewContext(iso)
	ctx2 := v8.NewContext(iso)

	// primitives are copied, but the old pointers to still point to the old ones
	v1, err := v8.NewValue(iso, int32(1))
	if err != nil {
		panic(err)
	}
	fmt.Println("ctx1 value", v1)

	if err := ctx2.Global().Set("x", v1); err != nil {
		panic(err)
	}
	v2, err := ctx2.Global().Get("x")
	if err != nil {
		panic(err)
	}
	fmt.Println("ctx2 value", v2)
	if _, err := ctx2.RunScript("x++", "main.js"); err != nil {
		panic(err)
	}
	fmt.Println("post-increment ctx2 value", v2)
	incrementedV2, err := ctx2.Global().Get("x")
	if err != nil {
		panic(err)
	}
	fmt.Println("incremented ctx2 value", incrementedV2)

	fmt.Println("ctx1 value after increment", v1)

	// values are copied, are pointers to objects shared?
	fmt.Printf("\n\nObject stuff\n\n")
	objPtr, err := v8.JSONParse(ctx1, `{"a": 1}`)
	if err != nil {
		panic(err)
	}
	s, err := v8.JSONStringify(ctx1, objPtr)
	if err != nil {
		panic(err)
	}
	fmt.Println("ctx1", s)

	if err := ctx2.Global().Set("x", objPtr); err != nil {
		panic(err)
	}
	if _, err := ctx2.RunScript("x.a++", "main.js"); err != nil {
		panic(err)
	}
	objPtr2, err := ctx2.Global().Get("x")
	if err != nil {
		panic(err)
	}
	s2, err := v8.JSONStringify(ctx2, objPtr2)
	if err != nil {
		panic(err)
	}
	fmt.Println("ctx2, should be two", s2)

	s, err = v8.JSONStringify(ctx1, objPtr)
	if err != nil {
		panic(err)
	}
	fmt.Println("ctx1", s)
	// yes, pointers reference the same object across contexts
}