Dragon Slayer Game In JavaScript

//   DRAGON SLAYER GAME IN JAVASCRIPT
var slaying = true;
var youHit = Math.floor(Math.random() * 2);
var damageThisRound = Math.floor(Math.random() * 5 + 1);
var totalDamage;
while(slaying)
{
    slaying = false;
    if(youHit = 1)
    {
        console.log("You hit the Dragon");
        totalDamage += damageThisRound;
        if(totalDamage >= 4)
        {
            console.log("The player slew the dragon.");
            slaying = false;
        }
        else
        {
            youHit = Math.floor(Math.random() * 2);
        }
    }
    else
    {
        console.log("The Dragon defeated you");
    }
}