Rock/Paper/Scissors What am I doing wrong?

//Rock, Paper, Scissors

//Prompt for choice:
var userChoice = prompt("Do you choose rock, paper or scissors?");

console.log("Your choice: " + userChoice);

//Computer plays:
var computerChoice = Math.random();
if (computerChoice < 0.34) {
    computerChoice = "rock";
} else if(computerChoice <= 0.67) {
    computerChoice = "paper";
} else {
    computerChoice = "scissors";
}
//log the choice
console.log("Computer choice: " + computerChoice);



//Choice results
var compare = function(choice1, choice2) {
    if (choice1 == choice2) {
    return "The result is a tie!";
    }

    //userChoice: rock
    else if (choice1 == "rock"){
        if(choice2 == "scissors"){
            return console.log("rock wins!");
        }
        else{
            return "paper wins";
        }
    }

    //userChoice: paper
    else if (choice1 == "paper") {
        if(choice2 == "rock"){
            return "paper wins";
        }
        else{
            return "scissors wins";
        }
    }

    //userChoice: scissors
    else{
        if(choice2 = "rock"){
            return "rock wins";
        }
        else{
            return "scissors wins";
        }
    }
  }

compare(userChoice, computerChoice);