golang open Downloads folder explorer window on Windows 10 not working

I can open a explorer window using on Windows 10 cmd

explorer C:\Users\bruce\Downloads\

So I'm thinking executing this command in go, but it opens Documents folder instead of Downloads folder, how can I solve this issue

package main

import (
	"fmt"
	"os"
	"os/exec"
	"runtime"
)

func main() {
	homeDir, _ := os.UserHomeDir()

	if runtime.GOOS == "darwin" {
		downloadDir := homeDir + "/Downloads/"
		cmd := `open "` + downloadDir + `"`
		exec.Command("/bin/bash", "-c", cmd).Output()
	} else {
		downloadDir := homeDir + "\\Downloads\\"
		cmd := `explorer ` + downloadDir
		fmt.Println("cmd: ", cmd)
		exec.Command("cmd", "/C", cmd).Output()
	}
}

Problem solved, turns out that the first parameter of exec.Command() should use explorer instead of cmd

The snippet below is working

package main

import (
	"os"
	"os/exec"
	"runtime"
	"strings"
)

func main() {
	homeDir, _ := os.UserHomeDir()
	downloadDir := homeDir + "/Downloads/"
	if runtime.GOOS == "darwin" {
		cmd := `open "` + downloadDir + `"`
		exec.Command("/bin/bash", "-c", cmd).Start()
	} else {
		downloadDir = strings.ReplaceAll(downloadDir, "/", "\\")
		exec.Command("explorer", downloadDir).Start()
	}
}

Edit

More simplified version, use downloadDir := filepath.Join(homeDir, "Downloads") instead of downloadDir = strings.ReplaceAll(downloadDir, "/", "\\")

package main

import (
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
)

func main() {
	homeDir, _ := os.UserHomeDir()
	downloadDir := filepath.Join(homeDir, "Downloads")
	if runtime.GOOS == "darwin" {
		exec.Command("open", downloadDir).Start()
	} else {
		exec.Command("explorer", downloadDir).Start()
	}
}

Edit2

package main

import (
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
)

func main() {
	homeDir, _ := os.UserHomeDir()
	downloadDir := filepath.Join(homeDir, "Downloads")
	cmd := "open"
	if runtime.GOOS == "windows" {
		cmd = "explorer"
	}
	exec.Command(cmd, downloadDir).Start()
}

Edit3

According to @panapol-p point out here

package main

import (
	"os"
	"os/exec"
	"path/filepath"
	"runtime"
)

func main() {
	homeDir, _ := os.UserHomeDir()

	cmd := "open"
	downloadDir := filepath.Join(homeDir, "Downloads")
	if runtime.GOOS == "windows" {
		cmd = "explorer"
		downloadDir = "shell:downloads"
	}
	exec.Command(cmd, downloadDir).Start()
}

[for window]<br>
I recommend using a specific folder instead of joining the path by yourself,
because when you install the application on a custom download path, your application will be run with the wrong condition.

a specific folder is a standard folder that was registered with the system and this one is on XP or higher version of window

for manual, you can use like this
> win + r -> shell:{specific folder}

example
> win + r -> shell:downloads

for golang you can use like this

err := exec.Command("explorer", "shell:downloads").Start()
if err != nil {
	log.Fatalln(err.Error())
}

for more information
https://gist.github.com/gabe31415/ac22a4f5c874ee33ab0083fdb4e24e66