Duktape is a thin, embeddable javascript engine. Most of the api is implemented. The exceptions are listed here.
The package is fully go-getable, no need to install any external C libraries.
So, just type go get gopkg.in/olebedev/go-duktape.v3 to install.
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()
}Bindings between Go and Javascript contexts are not fully functional. However, binding a Go function to the Javascript context is available:
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!')`)
}then run it.
$ go run *.go
Go lang Go!
$There is a method to inject timers to the global scope:
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)
}then run it
$ go run *.go
first step
second step
$Also you can FlushTimers().
Install go get gopkg.in/olebedev/go-duktape.v3/....
Execute file.js: $GOPATH/bin/go-duk file.js.
| prog | time |
|---|---|
| otto | 200.13s |
| anko | 231.19s |
| agora | 149.33s |
| GopherLua | 8.39s |
| go-duktape | 9.80s |
More details are here.
The package is not fully tested, so be careful.
Pull requests are welcome! Also, if you want to discuss something send a pull request with proposal and changes. Convention: fork the repository and make changes on your fork in a feature branch.