How can I prevent console from printing in JavaScript game? -


i've been practicing game javascript, , wondering how prevent console printing when user makes ill defined choice?

here code: 

var user = prompt("do choose rock, paper or scissors?"); var computer = math.random(); if (computer < 0.34) {     computer = "rock"; } else if (computer <= 0.67) {     computer = "paper"; } else {     computer = "scissors"; } console.log("computer chooses: " + computer); console.log("user chooses: " + user); var compare = function (computer, user) {     if (computer === "rock") {         if (user === "scissors") {             return "computer wins choosing rock!";         }     }     else if (computer === "scissors") {         if (user === "paper") {             return "computer wins choosing scissors!";         }     }     else if (computer === "paper") {         if (user === "rock") {             return "computer wins choosing paper!"         }     }     if (computer === user) {         return ("it tie!")     }     else if (user === "paper") {         if (computer === "rock") {             return ("you win choosing paper!")         }     }     else if (user === "rock") {         if (computer === "scissors") {             return ("you win choosing scissors!")         }     }     else if (user === "scissors") {         if (computer === "paper") {             return ("you win choosing scissors!")         }     }     ***if (user !== "rock" && user !== "paper" && user !== "scissors") {         confirm(user + " invalid entry.");     }*** }; compare(computer, user);

at end snipped bit of code gives user indication has put in wrong characters. wondering is:

how keep displaying console once has put in wrong input?

one option keep asking user valid input until valid input given:

while (user != "rock" && user != "paper" && user != "scissors") {     user = prompt("do choose rock, paper or scissors?")     if (user == null) {         break;     } };  if (user != null) { ... }

http://jsfiddle.net/2w3pt5yy/3/


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