Javascript:while循环无休止

Question

我一直试图修复这个循环,但显然它无法识别输入是否正确.我在这里使用正确的循环吗？

var userChoice = prompt("Do you choose rock, paper or scissors?") 
if (userChoice !== "rock", "paper", "scissors") {
  do {
    prompt("Invalid answer. Please choose rock, paper or scissors.");
  } while (userChoice !== "rock", "paper", "scissors");
} else { 

Answer 1

这里有两个主要问题:

• 你需要userChoice在你的do-while循环中重新分配:

  userChoice = prompt("Invalid answer. Please choose rock, paper or scissors.");
  

• 您的比较已关闭且不起作用,请在您的if和中使用它while:

  (userChoice != "rock" && userChoice != "paper" && userChoice != "scissors")