package main
import "fmt"
import "gopkg.in/olebedev/go-duktape.v3"
func main() {
  ctx := duktape.New()
  ctx.PevalString(`2 + 3`)
  result := ctx.GetNumber(-1)
  ctx.Pop()
  fmt.Println("result is:", result)
  // To prevent memory leaks, don't forget to clean up after
  // yourself when you're done using a context.
  ctx.DestroyHeap()
}

package main
import "fmt"
import "gopkg.in/olebedev/go-duktape.v3"
func main() {
  ctx := duktape.New()
  ctx.PushGlobalGoFunction("log", func(c *duktape.Context) int {
    fmt.Println(c.SafeToString(-1))
    return 0
  })
  ctx.PevalString(`log('Go lang Go!')`)
}

package main
import "fmt"
import "gopkg.in/olebedev/go-duktape.v3"
func main() {
  ctx := duktape.New()
  // Let's inject `setTimeout`, `setInterval`, `clearTimeout`,
  // `clearInterval` into global scope.
  ctx.PushTimers()
  ch := make(chan string)
  ctx.PushGlobalGoFunction("second", func(_ *Context) int {
    ch <- "second step"
    return 0
  })
  ctx.PevalString(`
    setTimeout(second, 0);
    print('first step');
  `)
  fmt.Println(<-ch)
}