密码强度检查器：对勾无法显示绿色（始终红色）的问题求助

问题核心是你已定义了.valid绿色样式，但未在JavaScript中根据验证结果为指示器元素添加/移除该类，导致始终应用.indicator的红色样式。以下是修复方案：

步骤1：修改JavaScript逻辑 #

优化重复正则测试，并通过类切换实现颜色变化：

document.getElementById("password").addEventListener("input", function() {
  var password = this.value.trim();
  var capitalCheck = document.getElementById("capitalCheck").querySelector(".indicator");
  var numberCheck = document.getElementById("numberCheck").querySelector(".indicator");
  var symbolCheck = document.getElementById("symbolCheck").querySelector(".indicator");

  // 存储验证结果，避免重复正则测试
  var hasCapital = /[A-Z]/.test(password);
  var hasNumber = /\d/.test(password);
  var hasSymbol = /[!@#$%^&*()_+\-=[\]{};':"\\|,.<>/?]/.test(password);

  // 设置指示器文本
  capitalCheck.textContent = hasCapital ? '✔' : '✘';
  numberCheck.textContent = hasNumber ? '✔' : '✘';
  symbolCheck.textContent = hasSymbol ? '✔' : '✘';

  // 根据结果切换valid类，实现颜色变化
  capitalCheck.classList.toggle("valid", hasCapital);
  numberCheck.classList.toggle("valid", hasNumber);
  symbolCheck.classList.toggle("valid", hasSymbol);

  // 移除冗余的visibility设置（两边均为visible）
});

步骤2：确认CSS优先级 #

你的CSS已正确定义样式，且.valid在.indicator之后定义，优先级足够覆盖红色：

span.indicator {
  font-size: 16px;
  color: red;
}

span.valid {
  color: green;
}

完整修改后的代码 #

HTML #

<br> <br> <br>

<div class="info-container">
  <p>Indsæt tekst her...</p>
</div>


<div class="container">
  <h1>Password Strength Checker</h1>
  <label for="password">Enter Password:</label>
  <input type="password" id="password" placeholder="Password">
  <div class="criteria">
    <div class="criteria-item" id="capitalCheck">Capital Letters: <span class="indicator"></span></div>
    <div class="criteria-item" id="numberCheck">Numbers: <span class="indicator"></span></div>
    <div class="criteria-item" id="symbolCheck">Symbols: <span class="indicator"></span></div>
  </div>
  <button onclick="calculateTime()">Calculate</button>
  <div id="result"></div>
</div>

CSS #

.info-container {
  background-color: #f0f0f0;
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 5px;
  text-align: center;
}

.container {
  background-color: #fff;
  padding: 30px;
  width: 400px;
  border-radius: 5px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.criteria-item {
  margin-bottom: 10px;
}

body {
  font-family: Arial, sans-serif;
  background-color: #f5f5f5;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
}

.container>h1 {
  font-size: 24px;
  text-align: center;
  margin-bottom: 20px;
}

label {
  font-size: 16px;
  display: block;
  margin-bottom: 10px;
}

input[type="password"] {
  width: 100%;
  padding: 10px;
  margin-bottom: 20px;
  border: 1px solid #ccc;
  border-radius: 3px;
}

button {
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 3px;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #0056b3;
}

p#result {
  margin-top: 20px;
  font-size: 18px;
  text-align: center;
}

ul.criteria {
  display: flex;
  justify-content: space-between;
  margin-bottom: 20px;
}

ul.criteria>li {
  font-size: 16px;
}

span.indicator {
  font-size: 16px;
  color: red;
}

span.valid {
  color: green;
}

JavaScript #

document.getElementById("password").addEventListener("input", function() {
  var password = this.value.trim();
  var capitalCheck = document.getElementById("capitalCheck").querySelector(".indicator");
  var numberCheck = document.getElementById("numberCheck").querySelector(".indicator");
  var symbolCheck = document.getElementById("symbolCheck").querySelector(".indicator");

  var hasCapital = /[A-Z]/.test(password);
  var hasNumber = /\d/.test(password);
  var hasSymbol = /[!@#$%^&*()_+\-=[\]{};':"\\|,.<>/?]/.test(password);

  capitalCheck.textContent = hasCapital ? '✔' : '✘';
  numberCheck.textContent = hasNumber ? '✔' : '✘';
  symbolCheck.textContent = hasSymbol ? '✔' : '✘';

  capitalCheck.classList.toggle("valid", hasCapital);
  numberCheck.classList.toggle("valid", hasNumber);
  symbolCheck.classList.toggle("valid", hasSymbol);
});


function calculateTime() {
  var password = document.getElementById("password").value;
  var charCount = password.length;
  var hasUpperCase = /[A-Z]/.test(password);
  var hasNumber = /\d/.test(password);
  var hasSymbol = /[!@#$%^&*()_+\-=[\]{};':"\\|,.<>/?]/.test(password);

  var possibleCharacters = 26 + (hasUpperCase ? 26 : 0) + (hasNumber ? 10 : 0) + (hasSymbol ? 32 : 0);
  var permutations = Math.pow(possibleCharacters, charCount);

  var seconds = permutations / 1000000000;
  var minutes = seconds / 60;
  var hours = minutes / 60;
  var days = hours / 24;
  var years = days / 365;

  var result = "It would take approximately ";
  if (years >= 1) {
    result += Math.floor(years) + " years, " + Math.floor(days % 365) + " days, " + Math.floor(hours % 24) + " hours, " + Math.floor(minutes % 60) + " minutes, and " + Math.floor(seconds % 60) + " seconds to crack this password.";
  } else if (days >= 1) {
    result += Math.floor(days) + " days, " + Math.floor(hours % 24) + " hours, " + Math.floor(minutes % 60) + " minutes, and " + Math.floor(seconds % 60) + " seconds to crack this password.";
  } else if (hours >= 1) {
    result += Math.floor(hours) + " hours, " + Math.floor(minutes % 60) + " minutes, and " + Math.floor(seconds % 60) + " seconds to crack this password.";
  } else if (minutes >= 1) {
    result += Math.floor(minutes) + " minutes, and " + Math.floor(seconds % 60) + " seconds to crack this password.";
  } else {
    result += Math.ceil(seconds) + " seconds to crack this password.";
  }

  document.getElementById("result").innerText = result;
}

内容的提问来源于stack exchange，提问作者Ko1ind