JSFiddle - React, Tailwind, and code Playground
JavaScript
var f=s=>{var a="paper,scissors,rock".split(",")/*/**/a[-1]="rock"
return a[a.indexOf(s)-1];`*/a((a.indexOf(s)+1)%3)//`//Ook. Ook! Ook! Ook? Ook! Ook. Ook. Ook! Ook? Ook!
}
alert(f("rock"))
alert(f("paper"))
alert(f("scissors"))