monaco-error-lens/example.html at main · ym-han/monaco-error-lens · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Monaco Error Lens - Working Example</title>
    <style>
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            margin: 0;
            padding: 20px;
            background: #f8f9fa;
            color: #212529;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .header {
            margin-bottom: 20px;
        }
        .editor-container {
            height: 600px;
            border: 1px solid #dee2e6;
            border-radius: 6px;
            overflow: hidden;
        }
        .controls {
            margin-top: 15px;
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        button {
            background: #007bff;
            color: white;
            border: none;
            padding: 8px 16px;
            border-radius: 4px;
            cursor: pointer;
            font-size: 14px;
        }
        button:hover {
            background: #0056b3;
        }
        button:disabled {
            background: #6c757d;
            cursor: not-allowed;
        }
        .status {
            margin-top: 10px;
            padding: 10px;
            background: #e9ecef;
            border-radius: 4px;
            font-family: 'Consolas', 'Monaco', monospace;
            font-size: 12px;
            color: #495057;
        }
        .info {
            margin-bottom: 15px;
            padding: 10px;
            background: #d4edda;
            border-left: 4px solid #28a745;
            border-radius: 4px;
        }
        .success {
            color: #155724;
            font-weight: bold;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="header">
            <h1>🔍 Monaco Error Lens - Working Example</h1>
            <div class="info">
                <span class="success">✅ Using Real Package:</span> This example uses the actual built Monaco Error Lens package from <code>./dist/index.js</code>
            </div>
        </div>

        <div class="editor-container" id="editor-container"></div>

        <div class="controls">
            <button onclick="addErrors()">Add Sample Errors</button>
            <button onclick="addWarnings()">Add Warnings</button>
            <button onclick="addMixed()">Add Mixed Diagnostics</button>
            <button onclick="clearMarkers()">Clear All</button>
            <button onclick="toggleErrorLens()">Toggle Error Lens</button>
            <button onclick="toggleTheme()">Toggle Theme</button>
            <button onclick="testOptions()">Test Configuration</button>
        </div>

        <div class="status" id="status">
            Ready - Click "Add Sample Errors" to see Error Lens in action!
        </div>
    </div>

    <!-- Monaco Editor -->
    <script src="https://cdn.jsdelivr.net/npm/monaco-editor@0.44.0/min/vs/loader.js"></script>

    <script type="module">
        // Import the actual Monaco Error Lens package
        import { MonacoErrorLens, setupErrorLens } from './dist/index.js';

        let editor, errorLens;
        let isDarkTheme = false;

        // Load Monaco Editor
        require.config({ paths: { vs: 'https://cdn.jsdelivr.net/npm/monaco-editor@0.44.0/min/vs' } });
        require(['vs/editor/editor.main'], function () {
            initializeEditor();
        });

        function initializeEditor() {
            // Sample TypeScript code with intentional issues
            const sampleCode = `// Sample TypeScript code with various issues
function calculateTotal(items: any[]) {
    let total = 0;

    for (const item of items) {
        if (item.price) {
            total += item.price;  // Missing type safety
        }
    }

    return total;  // Missing semicolon in some configs
}

const items = [
    { name: "Item 1", price: 10 },
    { name: "Item 2", price: undefined },  // Potential issue
    { name: "Item 3" }  // Missing price property
];

const result = calculateTotal(items);
console.log("Total:", result);

// Unused variable
const unusedVar = "This variable is never used";

// Function with any type
function processData(data: any) {
    return data.someProperty;  // Unsafe property access
}`;

            // Create Monaco Editor
            editor = monaco.editor.create(document.getElementById('editor-container'), {
                value: sampleCode,
                language: 'typescript',
                theme: 'vs',
                glyphMargin: true,  // Enable gutter icons
                lineNumbers: 'on',
                automaticLayout: true,
                minimap: { enabled: false },
                fontSize: 14,
                lineHeight: 20,
            });

            // Initialize Error Lens using the real package
            errorLens = setupErrorLens(editor, monaco, {
                enableInlineMessages: true,
                enableLineHighlights: true,
                enableGutterIcons: true,
                followCursor: 'allLines',
                messageTemplate: '💬 {message}',
                maxMessageLength: 100,
                updateDelay: 150
            });

            updateStatus('Monaco Editor loaded with real Monaco Error Lens package!');

            // Expose to global scope for button handlers
            window.errorLens = errorLens;
            window.monaco = monaco;
            window.updateStatus = updateStatus;
        }

        function updateStatus(message) {
            const status = document.getElementById('status');
            const timestamp = new Date().toLocaleTimeString();
            status.textContent = `[${timestamp}] ${message}`;
        }

        // Expose utility functions to global scope for buttons
        window.addErrors = function() {
            const markers = [
                {
                    startLineNumber: 6,
                    startColumn: 13,
                    endLineNumber: 6,
                    endColumn: 28,
                    message: "Unsafe assignment to 'total'. Variable 'item.price' could be undefined.",
                    severity: monaco.MarkerSeverity.Error,
                    source: 'typescript'
                },
                {
                    startLineNumber: 21,
                    startColumn: 5,
                    endLineNumber: 21,
                    endColumn: 24,
                    message: "Variable 'unusedVar' is declared but never used.",
                    severity: monaco.MarkerSeverity.Error,
                    source: 'eslint'
                },
                {
                    startLineNumber: 24,
                    startColumn: 21,
                    endLineNumber: 24,
                    endColumn: 32,
                    message: "Parameter 'data' implicitly has an 'any' type.",
                    severity: monaco.MarkerSeverity.Error,
                    source: 'typescript'
                }
            ];

            monaco.editor.setModelMarkers(editor.getModel(), 'demo', markers);
            updateStatus(`Added ${markers.length} error markers using real Error Lens`);
        };

        window.addWarnings = function() {
            const markers = [
                {
                    startLineNumber: 2,
                    startColumn: 31,
                    endLineNumber: 2,
                    endColumn: 36,
                    message: "Parameter should be typed more specifically than 'any[]'.",
                    severity: monaco.MarkerSeverity.Warning,
                    source: 'eslint'
                },
                {
                    startLineNumber: 16,
                    startColumn: 28,
                    endLineNumber: 16,
                    endColumn: 37,
                    message: "Property 'price' is undefined for this item.",
                    severity: monaco.MarkerSeverity.Warning,
                    source: 'typescript'
                },
                {
                    startLineNumber: 25,
                    startColumn: 17,
                    endLineNumber: 25,
                    endColumn: 29,
                    message: "Property 'someProperty' does not exist on type 'any'.",
                    severity: monaco.MarkerSeverity.Warning,
                    source: 'typescript'
                }
            ];

            monaco.editor.setModelMarkers(editor.getModel(), 'demo', markers);
            updateStatus(`Added ${markers.length} warning markers`);
        };

        window.addMixed = function() {
            const markers = [
                {
                    startLineNumber: 2,
                    startColumn: 31,
                    endLineNumber: 2,
                    endColumn: 36,
                    message: "Consider using a more specific type than 'any[]'",
                    severity: monaco.MarkerSeverity.Info,
                    source: 'suggestion'
                },
                {
                    startLineNumber: 6,
                    startColumn: 13,
                    endLineNumber: 6,
                    endColumn: 28,
                    message: "Potential null pointer exception",
                    severity: monaco.MarkerSeverity.Error,
                    source: 'static-analysis'
                },
                {
                    startLineNumber: 9,
                    startColumn: 5,
                    endLineNumber: 9,
                    endColumn: 11,
                    message: "Missing semicolon",
                    severity: monaco.MarkerSeverity.Warning,
                    source: 'eslint'
                },
                {
                    startLineNumber: 12,
                    startColumn: 1,
                    endLineNumber: 12,
                    endColumn: 2,
                    message: "Add a blank line before this statement",
                    severity: monaco.MarkerSeverity.Hint,
                    source: 'style'
                },
                {
                    startLineNumber: 21,
                    startColumn: 7,
                    endLineNumber: 21,
                    endColumn: 16,
                    message: "Variable is declared but never used",
                    severity: monaco.MarkerSeverity.Warning,
                    source: 'eslint'
                }
            ];

            monaco.editor.setModelMarkers(editor.getModel(), 'demo', markers);
            updateStatus(`Added ${markers.length} mixed severity markers`);
        };

        window.clearMarkers = function() {
            monaco.editor.setModelMarkers(editor.getModel(), 'demo', []);
            updateStatus('Cleared all markers');
        };

        window.toggleErrorLens = function() {
            const enabled = errorLens.toggle();
            updateStatus(`Error Lens ${enabled ? 'enabled' : 'disabled'}`);
        };

        window.toggleTheme = function() {
            isDarkTheme = !isDarkTheme;
            monaco.editor.setTheme(isDarkTheme ? 'vs-dark' : 'vs');
            updateStatus(`Switched to ${isDarkTheme ? 'dark' : 'light'} theme`);
        };

        window.testOptions = function() {
            // Test different configuration options
            errorLens.updateOptions({
                followCursor: 'activeLine',
                messageTemplate: '🚨 [{source}] {message}',
                maxMessageLength: 80
            });
            updateStatus('Updated Error Lens configuration - now following cursor only');
        };
    </script>
</body>
</html>