JSFiddle - React, Tailwind, and code Playground

HTML

<html>
<body>

</body>
</html>

JavaScript

let keepPlaying = function(){
  background = Math.floor(Math.random()).toString();
  document.body.innerHTML = background;
  
  var answer = prompt("What pokemon is this?")
  
   if (answer.toLowerCase() == background) {
    alert("correct")
    score ++
    replay = prompt("Want to keep playing?")
  } else {
    alert("incorrect")
    replay = prompt("Want to keep playing?")
  }
  if(replay == 'yes')
    keepPlaying()
  else
    return(score)
}();