javascript - if 语句在 javascript 中始终为真

Question

所以，我有代码，它还没有完成，但我想要它做的就是在我写“帮助”这个词时显示一个警告框，如果输入任何其他内容则显示其他内容。

function prompter() {
var reply = prompt("This script is made to help you learn about new bands, to view more info, type help, otherwise, just click OK") 
if (reply === 'help' || 'Help')
  {
  alert("This script helps you find new bands. It was originally written in Python 3.0.1, using Komodo IDE, but was then manually translated into Javascript. Please answer the questions honestly. If you have no opinion on a question, merely press OK without typing anything.")
  }
else
  {
  alert("Press OK to continue")
  }
};

但是，无论如何，第一个警告框弹出，即使你按下取消! 我该如何解决这个问题？？？

Answer 1

if (reply === 'help' || 'Help')

应该是:

if (reply === 'help' || reply === 'Help')

因为 'Help' 是“真实的”，所以 if 的第一部分将始终被输入。

当然，更好的做法是进行不区分大小写的比较:

if (reply.toLowerCase() === 'help')

示例: http://jsfiddle.net/qvEPe/