main.go

package main

import (
	"errors"
	"fmt"
	"time"

	"go.kuoruan.net/v8go-polyfills/console"
	"go.kuoruan.net/v8go-polyfills/fetch"
	"go.kuoruan.net/v8go-polyfills/timers"
	"rogchap.com/v8go"
)

func main() {
	iso := v8go.NewIsolate()
	global := v8go.NewObjectTemplate(iso)

	if err := fetch.InjectTo(iso, global); err != nil {
		panic(err)
	}
	if err := timers.InjectTo(iso, global); err != nil {
		panic(err)
	}

	ctx := v8go.NewContext(iso, global)
	if err := console.InjectTo(ctx); err != nil {
		panic(err)
	}

	_, err := ctx.RunScript("console.log('hola desde v8')", "hello.js")
	if err != nil {
		panic(err)
	}

	_, err = ctx.RunScript(`
	console.log(new Date().toUTCString());
	setTimeout(function() {
		console.log("Finish Timer v8go.");
		console.log(new Date().toUTCString());
	}, 90)`, "set_timeout.js")
	if err != nil {
		panic(err)
	}

	val, err := ctx.RunScript("fetch('https://www.example.com').then(res => res.text())", "fetch.js")
	if err != nil {
		panic(err)
	}

	proms, err := val.AsPromise()
	if err != nil {
		panic(err)
	}
	done := make(chan bool, 1)

	go func() {
		for proms.State() == v8go.Pending {
			continue
		}
		done <- true
	}()

	select {
	case <-time.After(time.Second * 10):
		panic(errors.New("request timeout"))
	case <-done:
		html := proms.Result().String()
		fmt.Printf("fecth finish example.com\n100 bytes\n%s\n", html[:100])
	}
}