Basic Demo

Interactive introduction to Loggical with all log levels, basic configuration, and object logging. Perfect starting point for new users.

📄 Source Code

html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Loggical Basic Usage Demo</title>
    <style>
      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
      }

      body {
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          Oxygen, Ubuntu, sans-serif;
        line-height: 1.6;
        color: #333;
        background: #f8f9fa;
        padding: 20px;
      }

      .container {
        max-width: 1200px;
        margin: 0 auto;
        background: white;
        border-radius: 12px;
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        overflow: hidden;
      }

      .header {
        background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
        color: white;
        padding: 30px;
        text-align: center;
      }

      .header h1 {
        font-size: 2.5rem;
        margin-bottom: 10px;
      }

      .header p {
        font-size: 1.1rem;
        opacity: 0.9;
      }

      .nav {
        background: #e9ecef;
        padding: 15px 30px;
        border-bottom: 1px solid #dee2e6;
      }

      .nav a {
        color: #495057;
        text-decoration: none;
        margin-right: 20px;
        font-weight: 500;
      }

      .nav a:hover {
        color: #28a745;
      }

      .content {
        padding: 30px;
      }

      .demo-section {
        margin-bottom: 40px;
        padding: 25px;
        background: #f8f9fa;
        border-radius: 8px;
        border-left: 4px solid #28a745;
      }

      .demo-section h2 {
        color: #2c3e50;
        margin-bottom: 15px;
        display: flex;
        align-items: center;
        gap: 10px;
      }

      .demo-section .icon {
        font-size: 1.5rem;
      }

      .demo-controls {
        display: flex;
        gap: 15px;
        margin-bottom: 20px;
        flex-wrap: wrap;
        align-items: center;
      }

      .demo-button {
        background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
        color: white;
        border: none;
        padding: 10px 20px;
        border-radius: 6px;
        cursor: pointer;
        font-weight: 500;
        transition: all 0.2s ease;
      }

      .demo-button:hover {
        transform: translateY(-2px);
        box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
      }

      .demo-button.secondary {
        background: #6c757d;
      }

      .demo-button.secondary:hover {
        background: #5a6268;
        box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
      }

      .demo-button.danger {
        background: #dc3545;
      }

      .demo-button.danger:hover {
        background: #c82333;
        box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
      }

      .demo-button.warning {
        background: #ffc107;
        color: #212529;
      }

      .demo-button.warning:hover {
        background: #e0a800;
        box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
      }

      .demo-button.info {
        background: #17a2b8;
      }

      .demo-button.info:hover {
        background: #138496;
        box-shadow: 0 4px 12px rgba(23, 162, 184, 0.3);
      }

      .demo-button.highlight {
        background: #6f42c1;
      }

      .demo-button.highlight:hover {
        background: #5a32a3;
        box-shadow: 0 4px 12px rgba(111, 66, 193, 0.3);
      }

      .demo-button.fatal {
        background: #dc3545;
        animation: pulse 2s infinite;
      }

      @keyframes pulse {
        0% {
          box-shadow: 0 0 0 0 rgba(220, 53, 69, 0.7);
        }
        70% {
          box-shadow: 0 0 0 10px rgba(220, 53, 69, 0);
        }
        100% {
          box-shadow: 0 0 0 0 rgba(220, 53, 69, 0);
        }
      }

      .log-output {
        background: #1e1e1e;
        color: #d4d4d4;
        padding: 20px;
        border-radius: 8px;
        font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas,
          monospace;
        font-size: 13px;
        line-height: 1.4;
        overflow-x: auto;
        white-space: pre-wrap;
        min-height: 100px;
        border: 1px solid #333;
        margin-top: 15px;
      }

      .config-panel {
        background: white;
        border: 1px solid #dee2e6;
        border-radius: 8px;
        padding: 20px;
        margin-bottom: 20px;
      }

      .config-row {
        display: flex;
        gap: 20px;
        margin-bottom: 15px;
        align-items: center;
        flex-wrap: wrap;
      }

      .config-group {
        display: flex;
        flex-direction: column;
        gap: 5px;
      }

      .config-group label {
        font-weight: 600;
        color: #495057;
        font-size: 14px;
      }

      .config-group select,
      .config-group input {
        padding: 8px 12px;
        border: 1px solid #ced4da;
        border-radius: 4px;
        font-size: 14px;
      }

      .config-group input[type="checkbox"] {
        width: auto;
        margin: 0;
      }

      .checkbox-group {
        display: flex;
        align-items: center;
        gap: 8px;
      }

      .explanation {
        background: #e8f4fd;
        border-left: 4px solid #17a2b8;
        padding: 15px;
        margin: 15px 0;
        border-radius: 4px;
      }

      .explanation h4 {
        color: #0c5460;
        margin-bottom: 8px;
      }

      .explanation p {
        color: #0c5460;
        margin: 0;
      }

      .code-example {
        background: #f8f9fa;
        border: 1px solid #e9ecef;
        border-radius: 4px;
        padding: 15px;
        margin: 15px 0;
        font-family: "SF Mono", Monaco, "Cascadia Code", monospace;
        font-size: 13px;
        overflow-x: auto;
      }

      .clear-button {
        background: #6c757d;
        color: white;
        border: none;
        padding: 8px 15px;
        border-radius: 4px;
        cursor: pointer;
        font-size: 12px;
        margin-left: auto;
      }

      .clear-button:hover {
        background: #5a6268;
      }

      /* ANSI color classes */
      .ansi-black {
        color: #2d3748;
      }
      .ansi-red {
        color: #f56565;
      }
      .ansi-green {
        color: #48bb78;
      }
      .ansi-yellow {
        color: #ed8936;
      }
      .ansi-blue {
        color: #4299e1;
      }
      .ansi-magenta {
        color: #9f7aea;
      }
      .ansi-cyan {
        color: #38b2ac;
      }
      .ansi-white {
        color: #f7fafc;
      }
      .ansi-gray {
        color: #a0aec0;
      }
      .ansi-bright-red {
        color: #fc8181;
      }
      .ansi-bright-green {
        color: #68d391;
      }
      .ansi-bright-yellow {
        color: #f6e05e;
      }
      .ansi-bright-blue {
        color: #63b3ed;
      }
      .ansi-bright-magenta {
        color: #b794f6;
      }
      .ansi-bright-cyan {
        color: #4fd1c7;
      }
      .ansi-bright-white {
        color: #ffffff;
      }
      .ansi-dim {
        opacity: 0.6;
      }
      .ansi-bold {
        font-weight: bold;
      }

      @media (max-width: 768px) {
        .demo-controls {
          flex-direction: column;
          align-items: stretch;
        }

        .config-row {
          flex-direction: column;
          align-items: stretch;
        }
      }
    </style>
  </head>
  <body>
    <div class="container">
      <div class="header">
        <h1>📚 Basic Usage Demo</h1>
        <p>Learn the fundamentals of Loggical with interactive examples</p>
      </div>

      <div class="nav">
        <a href="index.html">← Back to Demos</a>
        <a href="playground/">Interactive Playground</a>
        <a href="formatting-demo.html">Formatting Showcase</a>
      </div>

      <div class="content">
        <!-- Log Levels Section -->
        <div class="demo-section">
          <h2><span class="icon">🎯</span>Log Levels</h2>
          <div class="explanation">
            <h4>Understanding Log Levels</h4>
            <p>
              Loggical provides 6 log levels with different priorities and
              visual styling. Each level serves a specific purpose in your
              application logging strategy.
            </p>
          </div>

          <div class="demo-controls">
            <button class="demo-button info" onclick="logLevel('debug')">
              🐛 DEBUG
            </button>
            <button class="demo-button" onclick="logLevel('info')">
              ℹ️ INFO
            </button>
            <button class="demo-button warning" onclick="logLevel('warn')">
              ⚠️ WARN
            </button>
            <button class="demo-button danger" onclick="logLevel('error')">
              ❌ ERROR
            </button>
            <button
              class="demo-button highlight"
              onclick="logLevel('highlight')"
            >
              ✨ HIGHLIGHT
            </button>
            <button class="demo-button fatal" onclick="logLevel('fatal')">
              💀 FATAL
            </button>
            <button class="clear-button" onclick="clearOutput('levels-output')">
              Clear
            </button>
          </div>

          <div class="code-example">
            import { logger } from 'loggical' logger.debug('Detailed diagnostic
            information') logger.info('General application flow')
            logger.warn('Something needs attention') logger.error('An error
            occurred') logger.highlight('Important information')
            logger.fatal('Critical system failure')
          </div>

          <div id="levels-output" class="log-output">
            Click the buttons above to see different log levels in action!
          </div>
        </div>

        <!-- Configuration Section -->
        <div class="demo-section">
          <h2><span class="icon">⚙️</span>Basic Configuration</h2>
          <div class="explanation">
            <h4>Customizing Your Logger</h4>
            <p>
              Configure your logger with different options to match your needs.
              Try different combinations and see the results immediately.
            </p>
          </div>

          <div class="config-panel">
            <div class="config-row">
              <div class="config-group">
                <label>Color Level</label>
                <select id="colorLevel">
                  <option value="NONE">None</option>
                  <option value="BASIC">Basic</option>
                  <option value="ENHANCED" selected>Enhanced</option>
                </select>
              </div>
              <div class="config-group">
                <label>Prefix</label>
                <input
                  type="text"
                  id="prefix"
                  placeholder="e.g., API, DB, AUTH"
                  value="DEMO"
                />
              </div>
              <div class="config-group">
                <div class="checkbox-group">
                  <input type="checkbox" id="timestamps" checked />
                  <label for="timestamps">Show Timestamps</label>
                </div>
              </div>
              <div class="config-group">
                <div class="checkbox-group">
                  <input type="checkbox" id="symbols" checked />
                  <label for="symbols">Use Symbols</label>
                </div>
              </div>
            </div>
          </div>

          <div class="demo-controls">
            <button class="demo-button" onclick="testConfiguration()">
              🧪 Test Configuration
            </button>
            <button
              class="demo-button secondary"
              onclick="resetConfiguration()"
            >
              🔄 Reset
            </button>
            <button class="clear-button" onclick="clearOutput('config-output')">
              Clear
            </button>
          </div>

          <div class="code-example" id="config-code">
            import { Logger, ColorLevel } from 'loggical' const logger = new
            Logger({ colorLevel: ColorLevel.ENHANCED, prefix: 'DEMO',
            timestamped: true, useSymbols: true })
          </div>

          <div id="config-output" class="log-output">
            Configure the logger above and click "Test Configuration" to see the
            results!
          </div>
        </div>

        <!-- Pre-configured Loggers Section -->
        <div class="demo-section">
          <h2><span class="icon">⚡</span>Pre-configured Loggers</h2>
          <div class="explanation">
            <h4>Ready-to-Use Logger Instances</h4>
            <p>
              Loggical provides pre-configured logger instances optimized for
              different use cases. These are the recommended way to use Loggical
              for most applications.
            </p>
            <div class="code-example">
              <strong>Available Instances:</strong><br />
              <code>logger</code> - Standard balanced configuration<br />
              <code>compactLogger</code> - Space-efficient with symbols<br />
              <code>readableLogger</code> - Enhanced for development<br />
              <code>serverLogger</code> - Production-optimized
            </div>
          </div>
          <div class="demo-controls">
            <button class="demo-button" onclick="demonstratePreConfigured()">
              ⚡ Try Pre-configured Loggers
            </button>
            <button class="demo-button" onclick="compareLoggerTypes()">
              🔄 Compare Logger Types
            </button>
          </div>
          <div class="output-container">
            <div id="preconfigured-output" class="output"></div>
          </div>
        </div>

        <!-- Object Logging Section -->
        <div class="demo-section">
          <h2><span class="icon">📦</span>Object & Data Logging</h2>
          <div class="explanation">
            <h4>Logging Complex Data</h4>
            <p>
              Loggical handles objects, arrays, errors, and other complex data
              types with intelligent formatting and optional compaction.
            </p>
          </div>

          <div class="demo-controls">
            <button class="demo-button" onclick="logObject('simple')">
              📄 Simple Object
            </button>
            <button class="demo-button" onclick="logObject('nested')">
              🏗️ Nested Object
            </button>
            <button class="demo-button" onclick="logObject('array')">
              📋 Array
            </button>
            <button class="demo-button danger" onclick="logObject('error')">
              💥 Error Object
            </button>
            <button class="demo-button info" onclick="logObject('mixed')">
              🎭 Mixed Data
            </button>
            <button class="clear-button" onclick="clearOutput('object-output')">
              Clear
            </button>
          </div>

          <div class="config-panel">
            <div class="config-row">
              <div class="config-group">
                <div class="checkbox-group">
                  <input type="checkbox" id="compactObjects" />
                  <label for="compactObjects">Compact Object Formatting</label>
                </div>
              </div>
              <div class="config-group">
                <div class="checkbox-group">
                  <input type="checkbox" id="redaction" checked />
                  <label for="redaction"
                    >Enable Redaction (hides sensitive data)</label
                  >
                </div>
              </div>
            </div>
          </div>

          <div class="code-example">
            // Objects are automatically formatted logger.info('User data', {
            id: 123, name: 'John', email: 'john@example.com' }) // Arrays are
            handled intelligently logger.info('Items', ['apple', 'banana',
            'cherry']) // Errors include stack traces logger.error('Operation
            failed', new Error('Database connection lost'))
          </div>

          <div id="object-output" class="log-output">
            Click the buttons above to see different data types being logged!
          </div>
        </div>

        <!-- Real-world Examples Section -->
        <div class="demo-section">
          <h2><span class="icon">🌍</span>Real-world Examples</h2>
          <div class="explanation">
            <h4>Common Logging Patterns</h4>
            <p>
              See how Loggical works in realistic application scenarios with
              proper context and error handling.
            </p>
          </div>

          <div class="demo-controls">
            <button class="demo-button" onclick="realWorldExample('api')">
              🌐 API Request
            </button>
            <button class="demo-button" onclick="realWorldExample('database')">
              🗄️ Database Operation
            </button>
            <button class="demo-button" onclick="realWorldExample('auth')">
              🔐 Authentication
            </button>
            <button class="demo-button" onclick="realWorldExample('error')">
              🚨 Error Handling
            </button>
            <button
              class="clear-button"
              onclick="clearOutput('realworld-output')"
            >
              Clear
            </button>
          </div>

          <div class="code-example">
            // API Request Logging const apiLogger = logger.withPrefix('API')
            apiLogger.info('Incoming request', { method: 'POST', endpoint:
            '/users', ip: '192.168.1.100' }) apiLogger.info('Request processed',
            { statusCode: 201, duration: '125ms' }) // Database Operations const
            dbLogger = logger.withPrefix('DB') dbLogger.info('Query executed', {
            table: 'users', operation: 'SELECT', rows: 42 }) // Authentication
            Flow const authLogger = logger.withPrefix('AUTH')
            authLogger.info('Login attempt', { userId: 'user123', success: true
            })
          </div>

          <div id="realworld-output" class="log-output">
            Click the buttons above to see realistic logging scenarios!
          </div>
        </div>
      </div>
    </div>

    <script type="module">
      import {
        Logger,
        LogLevel,
        ColorLevel,
        logger,
        compactLogger,
        readableLogger,
        serverLogger,
      } from "loggical";

      // Global logger instance for demos
      let currentLogger = new Logger();

      // ANSI to HTML conversion function
      function ansiToHtml(text) {
        const ansiMap = {
          0: "reset",
          1: "ansi-bold",
          2: "ansi-dim",
          30: "ansi-black",
          31: "ansi-red",
          32: "ansi-green",
          33: "ansi-yellow",
          34: "ansi-blue",
          35: "ansi-magenta",
          36: "ansi-cyan",
          37: "ansi-white",
          90: "ansi-gray",
          91: "ansi-bright-red",
          92: "ansi-bright-green",
          93: "ansi-bright-yellow",
          94: "ansi-bright-blue",
          95: "ansi-bright-magenta",
          96: "ansi-bright-cyan",
          97: "ansi-bright-white",
          39: "reset-fg",
        };

        let html = text
          .replace(/&/g, "&amp;")
          .replace(/</g, "&lt;")
          .replace(/>/g, "&gt;");

        let openSpans = [];

        html = html.replace(
          /(?:\033\[|\x1b\[|\[)([0-9;]+)m/g,
          (match, codes) => {
            const codeList = codes.split(";");
            let result = "";

            codeList.forEach((code) => {
              if (code === "0" || code === "39") {
                result += "</span>".repeat(openSpans.length);
                openSpans = [];
              } else if (ansiMap[code]) {
                const className = ansiMap[code];
                if (className !== "reset" && className !== "reset-fg") {
                  result += `<span class="${className}">`;
                  openSpans.push(className);
                }
              }
            });

            return result;
          }
        );

        html += "</span>".repeat(openSpans.length);
        return html;
      }

      // Custom transport for capturing output
      class DemoTransport {
        constructor(outputElementId) {
          this.name = "demo";
          this.outputElementId = outputElementId;
          this.messages = [];
        }

        write(formattedMessage, metadata) {
          this.messages.push(formattedMessage);
          const element = document.getElementById(this.outputElementId);
          if (element) {
            const colorLevel = currentLogger.colorLevel || ColorLevel.ENHANCED;
            if (colorLevel === ColorLevel.NONE) {
              const plainText = formattedMessage.replace(
                /(?:\033\[|\x1b\[|\[)([0-9;]+)m/g,
                ""
              );
              element.textContent += plainText + "\n";
            } else {
              const htmlOutput = ansiToHtml(formattedMessage);
              element.innerHTML += htmlOutput + "\n";
            }
            element.scrollTop = element.scrollHeight;
          }
        }
      }

      // Global functions for demo buttons
      window.logLevel = function (level) {
        const transport = new DemoTransport("levels-output");
        const logger = new Logger({ transports: [transport] });

        const messages = {
          debug: "This is a debug message - detailed diagnostic information",
          info: "This is an info message - general application flow",
          warn: "This is a warning message - something needs attention",
          error:
            "This is an error message - an error occurred but app continues",
          highlight: "This is a highlight message - important information",
          fatal: "This is a fatal message - critical system failure",
        };

        logger[level](messages[level]);
      };

      window.testConfiguration = function () {
        const colorLevel = document.getElementById("colorLevel").value;
        const prefix = document.getElementById("prefix").value;
        const timestamps = document.getElementById("timestamps").checked;
        const symbols = document.getElementById("symbols").checked;

        const transport = new DemoTransport("config-output");
        currentLogger = new Logger({
          colorLevel: ColorLevel[colorLevel],
          prefix: prefix || undefined,
          timestamped: timestamps,
          useSymbols: symbols,
          transports: [transport],
        });

        // Update code example
        const codeExample = document.getElementById("config-code");
        codeExample.textContent = `import { Logger, ColorLevel } from 'loggical'

const logger = new Logger({
  colorLevel: ColorLevel.${colorLevel},${
          prefix ? `\n  prefix: '${prefix}',` : ""
        }
  timestamped: ${timestamps},
  useSymbols: ${symbols}
})`;

        currentLogger.debug("Debug message with current configuration");
        currentLogger.info("Info message with current configuration");
        currentLogger.warn("Warning message with current configuration");
        currentLogger.error("Error message with current configuration");
      };

      window.resetConfiguration = function () {
        document.getElementById("colorLevel").value = "ENHANCED";
        document.getElementById("prefix").value = "DEMO";
        document.getElementById("timestamps").checked = true;
        document.getElementById("symbols").checked = true;
        testConfiguration();
      };

      window.logObject = function (type) {
        const compactObjects =
          document.getElementById("compactObjects").checked;
        const redaction = document.getElementById("redaction").checked;

        const transport = new DemoTransport("object-output");
        const logger = new Logger({
          compactObjects,
          redaction,
          transports: [transport],
        });

        switch (type) {
          case "simple":
            logger.info("User profile", {
              id: 12345,
              name: "John Doe",
              email: "john.doe@example.com",
              active: true,
            });
            break;
          case "nested":
            logger.info("Application config", {
              database: {
                host: "localhost",
                port: 5432,
                credentials: {
                  username: "admin",
                  password: "secret123", // Will be redacted if enabled
                },
              },
              features: {
                authentication: true,
                logging: { level: "info", format: "json" },
              },
            });
            break;
          case "array":
            logger.info("Shopping cart items", [
              { id: 1, name: "Laptop", price: 999.99 },
              { id: 2, name: "Mouse", price: 29.99 },
              { id: 3, name: "Keyboard", price: 79.99 },
            ]);
            break;
          case "error":
            try {
              throw new Error("Database connection failed");
            } catch (error) {
              logger.error("Operation failed", {
                error,
                context: { operation: "fetchUsers", retryCount: 3 },
              });
            }
            break;
          case "mixed":
            logger.info("Complex data structure", {
              timestamp: new Date(),
              user: { id: 123, name: "Alice" },
              tags: ["important", "urgent", "customer"],
              metadata: null,
              count: 42,
              enabled: true,
              apiKey: "sk_live_abcdef123456", // Will be redacted if enabled
            });
            break;
        }
      };

      window.realWorldExample = function (scenario) {
        const transport = new DemoTransport("realworld-output");
        const baseLogger = new Logger({ transports: [transport] });

        switch (scenario) {
          case "api":
            const apiLogger = baseLogger.withPrefix("API");
            apiLogger.info("Incoming request", {
              method: "POST",
              endpoint: "/api/users",
              ip: "192.168.1.100",
              userAgent: "Mozilla/5.0...",
            });
            apiLogger.info("Validating request body");
            apiLogger.info("Request processed successfully", {
              statusCode: 201,
              duration: "125ms",
              userId: "user_12345",
            });
            break;
          case "database":
            const dbLogger = baseLogger.withPrefix("DB");
            dbLogger.info("Connecting to database", {
              host: "localhost",
              database: "app_prod",
            });
            dbLogger.info("Query executed", {
              table: "users",
              operation: "SELECT",
              rows: 42,
              duration: "23ms",
            });
            dbLogger.warn("Query took longer than expected", {
              query: "SELECT * FROM orders WHERE date > ?",
              duration: "1.2s",
              threshold: "500ms",
            });
            break;
          case "auth":
            const authLogger = baseLogger.withPrefix("AUTH");
            authLogger.info("Login attempt", {
              userId: "user123",
              ip: "192.168.1.100",
              userAgent: "Chrome/91.0",
            });
            authLogger.info("Password verification successful");
            authLogger.info("JWT token generated", {
              userId: "user123",
              expiresIn: "24h",
              token: "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...", // Will be redacted
            });
            authLogger.info("Login successful", {
              userId: "user123",
              sessionId: "sess_abc123",
            });
            break;
          case "error":
            const errorLogger = baseLogger.withPrefix("ERROR");
            try {
              // Simulate an error
              throw new Error("Payment gateway timeout");
            } catch (error) {
              errorLogger.error("Payment processing failed", {
                error,
                orderId: "order_12345",
                amount: 99.99,
                gateway: "stripe",
                retryCount: 3,
                context: {
                  userId: "user123",
                  timestamp: new Date().toISOString(),
                },
              });
            }
            errorLogger.warn("Initiating retry mechanism");
            errorLogger.info("Fallback payment method activated");
            break;
        }
      };

      window.clearOutput = function (elementId) {
        const element = document.getElementById(elementId);
        if (element) {
          element.innerHTML = "";
          element.textContent = "Output cleared. Try the demo buttons above!";
        }
      };

      window.demonstratePreConfigured = function () {
        const transport = new DemoTransport("preconfigured-output");
        transport.clear();

        // Demonstrate each pre-configured logger
        const loggers = [
          {
            name: "logger",
            instance: logger,
            description: "Standard balanced configuration",
          },
          {
            name: "compactLogger",
            instance: compactLogger,
            description: "Space-efficient with symbols",
          },
          {
            name: "readableLogger",
            instance: readableLogger,
            description: "Enhanced for development",
          },
          {
            name: "serverLogger",
            instance: serverLogger,
            description: "Production-optimized",
          },
        ];

        loggers.forEach(({ name, instance, description }) => {
          transport.write(`\n=== ${name} (${description}) ===`);

          // Create logger with demo transport and same config as the instance
          const demoLogger = new Logger({
            preset: name === "logger" ? "standard" : name.replace("Logger", ""),
            transports: [transport],
          });

          demoLogger.info("User authentication successful", {
            userId: 12345,
            method: "oauth",
          });
          demoLogger.warn("API rate limit approaching", {
            current: 85,
            limit: 100,
          });
          demoLogger.error("Database connection failed", {
            host: "db.example.com",
            timeout: 5000,
          });
        });
      };

      window.compareLoggerTypes = function () {
        const transport = new DemoTransport("preconfigured-output");
        transport.clear();

        const message = "Processing user request";
        const data = {
          requestId: "req_abc123",
          userId: 42,
          endpoint: "/api/users/profile",
          duration: 156.7,
          metadata: { userAgent: "Mozilla/5.0", ip: "192.168.1.100" },
        };

        transport.write("=== Comparing Logger Output Styles ===\n");

        // Standard logger
        transport.write("📋 Standard Logger:");
        const standardLogger = new Logger({ transports: [transport] });
        standardLogger.info(message, data);

        // Compact logger
        transport.write("\n💾 Compact Logger:");
        const demoCompactLogger = new Logger({
          preset: "compact",
          transports: [transport],
        });
        demoCompactLogger.info(message, data);

        // Readable logger
        transport.write("\n👁️ Readable Logger:");
        const demoReadableLogger = new Logger({
          preset: "readable",
          transports: [transport],
        });
        demoReadableLogger.info(message, data);

        // Server logger
        transport.write("\n🖥️ Server Logger:");
        const demoServerLogger = new Logger({
          preset: "server",
          transports: [transport],
        });
        demoServerLogger.info(message, data);
      };

      // Initialize with default configuration
      document.addEventListener("DOMContentLoaded", function () {
        testConfiguration();
      });
    </script>
  </body>
</html>

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✨ Features

✅ Interactive log level demonstration (DEBUG, INFO, WARN, ERROR, HIGHLIGHT, FATAL)
✅ Real-time output display with ANSI color conversion
✅ Basic logger configuration options
✅ Object and data structure logging examples
✅ Browser-based ES module integration

🚀 Running This Demo

bash

# Build the package first
pnpm run build

# Start the demo server
node examples/serve.js

# Then open in your browser:
# http://localhost:3000/basic-demo.html

← Back to Examples Overview
API Reference - Technical documentation
Getting Started Guide - Setup instructions

This interactive demo is automatically embedded from examples/basic-demo.html.

Basic Demo ​

📄 Source Code ​

✨ Features ​

🚀 Running This Demo ​

🔗 Related ​

Basic Demo

📄 Source Code

✨ Features

🚀 Running This Demo

🔗 Related