Super simple emoji spinner/waiting animation in Golang

spinner.go

package main

import (
	"fmt"
	"time"
)

var (
	monkeys = []string{"🙈", "🙈", "🙉", "🙊"}
	clocks  = []string{"🕛", "🕐", "🕑", "🕒", "🕓", "🕔", "🕕", "🕖", "🕗", "🕘", "🕙", "🕚"}
	moons   = []string{"🌑", "🌒", "🌓", "🌔", "🌕", "🌖", "🌗", "🌘"}
	smiley  = []string{"😄", "🤔", "😐"}
)

func spinner(message string, animation []string, interval time.Duration) func() {
	ch := make(chan struct{})
	i := 0
	go func() {
		for {
			select {
			case <-time.After(interval):
				fmt.Printf("\r%s %s", animation[i], message)
				i = (i + 1) % len(animation)
			case <-ch:
				return
			}
		}
	}()
	return func() { close(ch) }
}

func main() {
	// choose your animation and its interval
	cancel := spinner("Waiting...", monkeys, 200*time.Millisecond)
	// some long operation...
	time.Sleep(20 * time.Second)
	// call cancel function when done
	cancel()
}

⚠️ It only works if your output is a terminal