javascript - 如何在 JS 验证过程中区分特殊字符

Question

我正在用 JS 编写一个密码验证器(非常基本，这只是一个练习)，当我尝试验证大写或小写时，我会得到一个“有效密码”答案，即使没有一个或其他存在，只要有特殊字符在里面。我知道为什么会发生这种情况，但我想弄清楚的是如何在验证小写或大写时排除特殊字符。代码如下:

function ValidatePassword(input){
  if(hasUppercase(input) && hasLowercase(input) && isLongEnough(input) && hasSpecialCharacters(input)){
    console.log('The password is valid.');
  }else if(!hasUppercase(input)){
    console.log('The password needs at least one capital letter.');
  }else if(!hasLowercase(input)){
    console.log('The password needs at least one lowercase letter.');
  }else if(!isLongEnough(input)){
    console.log('The password needs to be at least 8 characters long.');
  }else if(!hasSpecialCharacters(input)){
    console.log('The password needs at least one special character.');
  }
}

function hasUppercase(input){
  for(var i = 0; i < input.length; i++){
    if(input[i] === input[i].toUpperCase()){
      return true;
    }
  }
}

function hasLowercase(input){
  for (var i = 0; i < input.length; i++){
    if(input[i] === input[i].toLowerCase()){
      return true;
    }
  }
}

function isLongEnough(input){
  if(input.length >= 8){
    return true;
  }
}

function hasSpecialCharacters(input){
  var specialCharacters = ["/", "*", "-", "+", "_", "@", "%", "&", "<", ">", "!", "(", ")", "$", "^", "\\", "#", ".", ",", ";", ":"];
  for(var i = 0; i < input.length; i++){
    for(var j = 0; j < specialCharacters.length; j++){
      if(input[i] === specialCharacters[j]){
        return true;
      }
    }
  }
}

无论如何，我很感激您能给我的任何帮助

Answer 1

如下所述更改 upperCase 和 lowerCase 函数

function hasLowercase(str) {
    return (/[a-z]/.test(str));
}

function hasUppercase(str) {
    return (/[A-Z]/.test(str));
}