Question

这是我的代码：如果有人输入不存在的名称，我希望我的开关循环。我是JavaScript的新手，我正在学习JavaScript工作，这是我刚刚练习的东西。它的功能是明智的，我只是试图找到一种方法，如果它通过默认情况下使其循环。谢谢！为了不使用我的同事姓名，我已将所有案件改为我的名字。

String.prototype.capitalizeFirstLetter = function() {
  return this.charAt(0).toUpperCase() + this.slice(1);
}

var name = prompt("Please enter the name of the recipient to recieve a burn notice").toLowerCase();


switch (name) {
  case 'brent':
  case 'brent':
  case 'brent':
  case 'brent':
  case 'brent':
  case 'brent':
  case 'brent':
  case 'brent':
    alert(name.capitalizeFirstLetter() + " has revieved a burn notice, ice is located downstairs in the freezer.");
    break;
  default:
    alert("Didn't find " + name.capitalizeFirstLetter() + " please try again.");
}

Answer 1

将代码放入函数中，如果达到默认情况，请再次调用它。

function askForName() {
  var name = prompt("Please enter the name of the recipient to recieve a burn notice").toLowerCase();

  switch (name) {
    case 'brent':
      alert(name.capitalizeFirstLetter() + " has revieved a burn notice, ice is located downstairs in the freezer.");
      break;
    default:
      alert("Didn't find " + name.capitalizeFirstLetter() + " please try again.");
      askForName();
  }
}

// initial call to make sure the function runs
askForName();

Answer 2

如果您将代码放在一个循环中，则可以使用continue转到循环的下一步。

for(;;) {
    var name = prompt("Please enter the name of the recipient to recieve a burn notice").toLowerCase();
    switch (name) {
        case 'brent':
            alert(name.capitalizeFirstLetter() + " has revieved a burn notice, ice is located downstairs in the freezer.");
            break;
        default:
            alert("Didn't find " + name.capitalizeFirstLetter() + " please try again.");
            continue;
    }
}

在示例中，continue是多余的，但您明白了。

无论如何，如果您提供有关您想要的更多信息，那么有更好的方法来实现所需的功能。

尝试在默认情况下切换到循环

2 个答案: