I created the following test file:

package main

import (
  "reflect"

  "github.com/gopherjs/gopherjs/js"
)

func main() {
  js.Global.Set("tester", map[string]interface{}{
    "Tester": tester,
  })
}

func tester(input string) string {
  reflect.DeepEqual(nil, nil)
  return input
}

I would like the Javascript that is generated to be constant across platforms. As such, I defined the following go generate:

GOOS=darwin gopherjs build main.go -o go.js

However, the output of the generated Javascript for the reflect package is subtly different. When run on a Darwin system versus a Linux system (tested in a Docker image).

Specifically, the code generated by Linux has extra $1 characters. Examples:

-  typ[0] = tt.elem;
+  typ$1[0] = tt.elem;

-  return wrapJsObject(typ[0], a[0][i[0]]);
+  return wrapJsObject(typ$1[0], a$1[0][i[0]]);

For now I can work around this by requiring the generation to be done in a Docker container so that the results are always consistent, but it would be much nicer if the output could be guaranteed to be stable/consistent for a given GOOS regardless of the host environment.