simple Rock paper scissors

simpleRPS.js

let choices = ['paper', 'rock', 'scissors'];
let playerChoice = prompt('What will you play? rock, paper or scissors?');
let opponentChoice = choices[Math.floor(Math.random() * 3)];

if (playerChoice === opponentChoice) {
  alert('Opponent had: ' + opponentChoice + '. DRAW!');
} else if (playerChoice === 'paper' && opponentChoice === 'rock') {
  alert('Opponent had: ' + opponentChoice + '. YOU WON :)!');
} else if (playerChoice === 'paper'  && opponentChoice === 'scissors') {
  alert('Opponent had: ' + opponentChoice + '. YOU LOST :(!');
} else if (playerChoice === 'rock' && opponentChoice === 'scissors') {
  alert('Opponent had: ' + opponentChoice + '. YOU WON :)!');
} else if (playerChoice === 'rock'  && opponentChoice === 'paper') {
  alert('Opponent had: ' + opponentChoice + '. YOU LOST :(!');
} else if (playerChoice === 'scissors'  && opponentChoice === 'paper') {
  alert('Opponent had: ' + opponentChoice + '. YOU WON :)!');
} else if (playerChoice === 'scissors' && opponentChoice === 'rock') {
  alert('Opponent had: ' + opponentChoice + '. YOU LOST :(!');
}