问在JavaScript中构建“石头、布、剪刀”

EN

var userChoice = prompt("Do you choose rock, paper or scissors?");
var computerChoice = Math.random();
if (computerChoice < 0.34) {
computerChoice = "rock";
} 
else if(computerChoice <= 0.67) {
computerChoice = "paper";
} 
else {
computerChoice = "scissors";
}
console.log("Computer: " + computerChoice);
var compare = function(choice1,choice2) {
if (choice1 === choice2) {
    return "The result is a tie!"
}
else if (choice1 === "rock") {
    if (choice2 === "scissors") {
        return "rock wins"
    }
    else {
        return "paper wins"
    }
}     compare(userChoice,computerChoice); //I forget to add it. Now I add it.