Javascript: while循环永无止境

Question

我一直在尝试修复此循环，但显然它无法识别输入何时正确。我在这里使用的循环类型正确吗？

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：

您需要在 do-while 循环中重新分配 userChoice：

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

您的比较已关闭且无效，请在您的 if 和 while:

中改用它

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

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