`let x=1` and `const x=1` don't work.

[ahuigo]

package m

import (
    "fmt"
    "testing"

    "github.com/robertkrimen/otto"
)

func TestEvalJs(t *testing.T) {
    vm := otto.New()
    vm.Set("body", `{"page":1}`)
    v, err := vm.Run(`
        let abc = 2 + 2;// Not work here
        console.log("The value of abc is " + abc); // 4
    `)
    if err != nil {
        fmt.Printf("%+v, val:%v", err, v)
    }
}

I find another lib which supports const/let: https://github.com/dop251/goja

[chrislowth]

Otto is an implementation of ECMA standard version ES5. "let" and "const" are not part of that standard. They were introduced in ES6.

You should use "var" instead.

On Fri, 22 Dec 2023, 04:09 Ahuigo, @.***> wrote:

package m

import ( "fmt" "testing"

"github.com/robertkrimen/otto" )

func TestEvalJs(t *testing.T) { vm := otto.New() vm.Set("body", {"page":1}) v, err := vm.Run( let abc = 2 + 2;// Not work here console.log("The value of abc is " + abc); // 4 ) if err != nil { fmt.Printf("%+v, val:%v", err, v) } }

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[Asday]

Please note that this is in the README also.

[stevenh]

PRs to introduce newer features are welcome, would be nice if we could get to ES6 in the future.