密码检查器 - JavaScript

此程序在浏览器中打开一个窗口。用户输入密码及其强度级别。它从包含 72 行代码的单个 .html 文件运行，包括 HTML 结构和嵌入式 JavaScript 功能。

这个例子是为了教学如何编码。该程序是基本的，并提供简单的、基于规则的密码强度检查。它应该被视为初步工具，而不是全面的安全措施。

    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Password Strength Checker</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: flex-start; /* Align the container at the top */
            height: 100vh;
            margin: 0;
            background-color: #f4f4f4;
        }

        .container {
            text-align: center;
            background-color: white;
            padding: 10px;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
            width: 220px; /* Small width similar to audio player */
            height: auto; /* Let height adjust based on content */
            margin-top: 20vh; /* Moves the container down by 20% of the viewport height */
        }

        input[type="password"] {
            padding: 5px;
            width: 180px; /* Keep it small */
            margin-top: 10px;
            border: 1px solid #ccc;
            border-radius: 4px;
        }

        #strength {
            margin-top: 10px;
            font-weight: bold;
        }
    </style>


    <div class="container">
        <h1 id="Password-Checker">Password Checker</h1>
        <input type="password" id="password" placeholder="Enter password">
        <div id="strength">Strength: </div>
    </div>

    <script>
        const passwordInput = document.getElementById('password');
        const strengthDisplay = document.getElementById('strength');

        passwordInput.addEventListener('input', function() {
            const password = passwordInput.value;
            const strength = calculatePasswordStrength(password);
            strengthDisplay.textContent = `Strength: ${strength}`;
        });

        function calculatePasswordStrength(password) {
            let strength = 'Weak';
            if (password.length >= 8) {
                strength = 'Medium';
            }
            if (/[A-Z]/.test(password) && /[0-9]/.test(password) && /[^A-Za-z0-9]/.test(password)) {
                strength = 'Strong';
            }
            return strength;
        }
    </script>

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本·桑托拉 - 2024 年 10 月

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