JavaScript Rock-Paper-Scissors

while (true){
var p1Name = prompt("What is Player One's name?")
var p2Name = prompt("What is Player Two's name?")

//Get player answers, && make answers case sensitive.

var p1 = (prompt((p1Name + ') { Rock, Paper, or Scissors?')))
var p2 = (prompt((p2Name + ') { Rock, Paper, or Scissors?')))

p1 = p1.toLocaleLowerCase();
p2 = p2.toLocaleLowerCase();

//In valid inputs
if (p1 != 'rock' && p1 != 'paper' && p1 != 'scissors') {
    console.log('Invalid input!');
} else if (p2 != 'rock' && p2 != 'paper' && p2 != 'scissors') {
console.log('Invalid input!')}

//Valid inputs

else if (p1 == 'rock' && p2 == 'scissors') {
    console.log(p1Name + ' has won!')
}

else if (p1 == 'rock' && p2 == 'paper') {
    console.log(p2Name + ' has won!')
}
else if (p1 == 'paper' && p2 == 'scissors') {
    console.log(p2Name + ' has won!')
}  else if (p1 == 'paper' && p2 == 'rock') {
    console.log(p1Name + ' has won!')
}  else if (p1 == 'scissors' && p2 == 'rock') {
    console.log(p2Name + ' has won!')
}  else if (p1 == 'scissors' && p2 == 'paper') {
    console.log(p1Name + ' has won!')
}  else if (p1 == p2) {
    console.log('It is a tie!')}

var repeat = prompt('Do you want to play again?')
repeat = repeat.toLocaleLowerCase();

if (repeat != 'yes' && repeat != 'y') {
    console.log('bye')
    break;
    }
}