Run Javascript in Go using Node.js.
go get -u github.com/tidwall/go-node
Create a Node.js VM and run some Javascript.
vm := node.New(nil)
vm.Run("iLoveTheJS = true");
youLoveIt := vm.Run("iLoveTheJS")
println(youLoveIt.String())
// output:
// trueThe Run function runs any Javascript code and returns a Value type that has
two methods, String and Error. If the Run call caused a Javascript
error then the Error method will contain that error. Otherwise, the String
method will contain the Javascript return value.
vm := node.New(nil)
vm.Run(`
function greatScott(){
console.log('1.21 gigawatts?');
return 'Delorean go vroom';
}
`);
v := vm.Run("greatScott()");
if err := v.Error(); err != nil {
log.Fatal(err)
}
println(v.String())
// output:
// 1.21 gigawatts?
// Deloran go vroomYou can "emit" messages from the Javascript to the Go. It's easy. Just use
the Options.OnEmit method in Go, and call the emit() function from JS.
opts := node.Options {
OnEmit: func(thing string) {
println(thing)
},
}
vm := node.New(&opts)
v := vm.Run("emit('a thing')")
if err := v.Error(); err != nil{
log.Fatal(err)
}
// output:
// a thingYay 🎉. Have fun now.
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