How to call binding functions from hosted runtime?

[Code2Life]

I didn't found the document about how to use bindings from hosted runtime. In my case is: a function defined in Node.js, and Node.js loads the WASM written by golang, compiled by tinygo with WASI target, but in golang code, HOW to call Node.js functions defined in bindings ?

const wasi = new WASI({
    env: {},
    args: [],
    bindings: {
      hostFunc: () => {
        console.log('Call host language function')
      }
    }
  })

package main
import (
	"fmt"
)
// this function should be defined in bindings
func hostFunc(obj string)

func main() {
	fmt.Println("test wasi is working")

       // NOT WORKING
	hostFunc()
}