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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">
<!-- Primary Meta Tags -->
<meta name="title" content="Markdown Viewer">
<meta name="description" content="Markdown Viewer is a powerful GitHub-style Markdown rendering tool with live preview, LaTeX math, Mermaid diagrams, syntax highlighting, dark mode, and export options to PDF, HTML, and MD—all fully client-side and secure.">
<meta name="keywords" content="Markdown Viewer, GitHub-style markdown, live preview, markdown editor, LaTeX support, Mermaid diagrams, PDF export, syntax highlighting, markdown to HTML, secure markdown tool, client-side markdown viewer, ThisIs-Developer, advanced markdown parser, future markdown viewer, next-gen markdown tool">
<meta name="author" content="ThisIs-Developer">
<meta name="robots" content="index, follow">
<meta name="language" content="English">
<meta name="distribution" content="global">
<meta name="rating" content="general">
<!-- Open Graph / Facebook -->
<meta property="og:type" content="website">
<meta property="og:url" content="https://markdownviewer.pages.dev/">
<meta property="og:title" content="Markdown Viewer">
<meta property="og:description" content="Markdown Viewer is a powerful GitHub-style Markdown rendering tool with live preview, LaTeX math, Mermaid diagrams, syntax highlighting, dark mode, and export options to PDF, HTML, and MD—all fully client-side and secure.">
<meta property="og:image" content="https://markdownviewer.pages.dev/assets/icon.jpg">
<!-- Twitter -->
<meta property="twitter:card" content="summary_large_image">
<meta property="twitter:url" content="https://markdownviewer.pages.dev/">
<meta property="twitter:title" content="Markdown Viewer">
<meta property="twitter:description" content="Markdown Viewer is a powerful GitHub-style Markdown rendering tool with live preview, LaTeX math, Mermaid diagrams, syntax highlighting, dark mode, and export options to PDF, HTML, and MD—all fully client-side and secure.">
<meta property="twitter:image" content="https://markdownviewer.pages.dev/assets/icon.jpg">
<title>Markdown Viewer</title>
<link href="assets/icon.jpg" rel="icon" type="image/jpg">
<!-- Updated libraries to latest versions -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.2/css/bootstrap.min.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/github-markdown-css/5.3.0/github-markdown.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/emoji-toolkit@9.0.1/extras/css/joypixels.min.css">
<link rel="stylesheet" href="styles.css">
<!-- Added mermaid CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/mermaid/10.6.1/mermaid.min.css">
<!-- Loading order optimized - ensure libraries are loaded before they're used -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/marked/9.1.6/marked.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.9.0/highlight.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/dompurify/3.0.9/purify.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.5/FileSaver.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2pdf.js/0.10.1/html2pdf.bundle.min.js"></script>
<script>
window.MathJax = {
tex: {
inlineMath: [['$', '$'], ['\\(', '\\)']],
displayMath: [['$$', '$$'], ['\\[', '\\]']],
processEscapes: true
}
};
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/3.2.2/es5/tex-mml-chtml.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/mermaid@11.6.0/dist/mermaid.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/emoji-toolkit@9.0.1/lib/js/joypixels.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jspdf/2.5.1/jspdf.umd.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/html2canvas/1.4.1/html2canvas.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.2.7/pdfmake.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pdfmake/0.2.7/vfs_fonts.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/pako/2.1.0/pako.min.js" integrity="sha384-rNlaE5fs9dGIjmxWDALQh/RBAaGRYT5ChrzHo6tRfgrZ36iRFAiquP5g41Jsv+0j" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/4.1.0/js-yaml.min.js"></script>
</head>
<body>
<div class="app-container">
<header class="app-header">
<div class="container-fluid d-flex justify-content-between align-items-center header-container">
<!-- Left section: Logo, GitHub, Stats -->
<div class="d-flex align-items-center header-left">
<h1 class="h4 mb-0 me-2">Markdown Viewer</h1>
<a href="https://github.com/ThisIs-Developer/Markdown-Viewer/" class="github-link" title="View on GitHub" target="_blank" rel="noopener noreferrer">
<i class="bi bi-github"></i>
</a>
<div id="stats-container" class="stats-container d-flex align-items-center d-none d-lg-flex">
<div class="stat-item me-3">
<i class="bi bi-clock me-1"></i> <span id="reading-time">0</span> Min Read
</div>
<div class="stat-item me-3">
<i class="bi bi-text-paragraph me-1"></i> <span id="word-count">0</span> Words
</div>
<div class="stat-item">
<i class="bi bi-fonts me-1"></i> <span id="char-count">0</span> Chars
</div>
</div>
</div>
<!-- Center section: View Mode Buttons -->
<div class="view-mode-group d-none d-md-flex" role="group" aria-label="View mode">
<button class="view-mode-btn" data-mode="editor" aria-pressed="false" title="Editor only">
<i class="bi bi-file-text"></i>
<span>Editor</span>
</button>
<button class="view-mode-btn active" data-mode="split" aria-pressed="true" title="Split view">
<i class="bi bi-layout-split"></i>
<span>Split</span>
</button>
<button class="view-mode-btn" data-mode="preview" aria-pressed="false" title="Preview only">
<i class="bi bi-eye"></i>
<span>Preview</span>
</button>
</div>
<!-- Right section: Toolbar -->
<div class="toolbar d-none d-md-flex header-right">
<button id="toggle-sync" class="tool-button sync-enabled border-primary" title="Toggle Sync Scrolling">
<i class="bi bi-link"></i> Sync Off
</button>
<div class="dropdown">
<button class="tool-button dropdown-toggle" type="button" id="importDropdown" data-bs-toggle="dropdown" aria-expanded="false" title="Import Markdown">
<i class="bi bi-upload"></i> Import
</button>
<ul class="dropdown-menu" aria-labelledby="importDropdown">
<li><a class="dropdown-item" href="#" id="import-from-file">From files</a></li>
<li><a class="dropdown-item" href="#" id="import-from-github">From GitHub</a></li>
</ul>
</div>
<input type="file" id="file-input" class="file-input" accept=".md,.markdown,text/markdown">
<div class="dropdown">
<button class="tool-button dropdown-toggle" type="button" id="exportDropdown" data-bs-toggle="dropdown" aria-expanded="false">
<i class="bi bi-download"></i> Export
</button>
<ul class="dropdown-menu" aria-labelledby="exportDropdown">
<li><a class="dropdown-item" href="#" id="export-md">Markdown (.md)</a></li>
<li><a class="dropdown-item" href="#" id="export-html">HTML</a></li>
<li><a class="dropdown-item" href="#" id="export-pdf">PDF</a></li>
</ul>
</div>
<button id="copy-markdown-button" class="tool-button" title="Copy Markdown">
<i class="bi bi-clipboard"></i> Copy
</button>
<button id="share-button" class="tool-button" title="Share via URL">
<i class="bi bi-share"></i> Share
</button>
<button id="theme-toggle" class="tool-button" title="Toggle Dark Mode">
<i class="bi bi-moon"></i>
</button>
</div>
<!-- Hamburger menu for mobile -->
<div class="mobile-menu d-md-none">
<button id="mobile-menu-toggle" class="tool-button" title="Menu">
<i class="bi bi-list"></i>
</button>
<div id="mobile-menu-panel" class="mobile-menu-panel">
<div class="mobile-menu-header">
<h5>Menu</h5>
<button id="close-mobile-menu" class="tool-button">
<i class="bi bi-x-lg"></i>
</button>
</div>
<!-- Mobile Document Tabs Section -->
<div class="mobile-tabs-section mb-3">
<div class="mobile-tabs-header">
<span class="mobile-tabs-label"><i class="bi bi-files me-1"></i> Documents</span>
<button id="mobile-new-tab-btn" class="mobile-new-tab-btn" title="New document" aria-label="New document">
<i class="bi bi-plus-lg"></i>
</button>
</div>
<div id="mobile-tab-list" class="mobile-tab-list" role="tablist" aria-label="Document tabs">
<!-- Dynamically populated by JavaScript -->
</div>
<button id="mobile-tab-reset-btn" class="tab-reset-btn mt-2 w-100" title="Reset all files" aria-label="Reset all files">
<i class="bi bi-arrow-counterclockwise"></i> Reset all files
</button>
</div>
<!-- Story 1.4: Mobile View Mode Buttons -->
<div class="mobile-view-mode-group mb-3" role="group" aria-label="View mode">
<button class="mobile-view-mode-btn" data-mode="editor" aria-pressed="false" title="Editor only">
<i class="bi bi-file-text"></i>
<span>Editor</span>
</button>
<button class="mobile-view-mode-btn active" data-mode="split" aria-pressed="true" title="Split view">
<i class="bi bi-layout-split"></i>
<span>Split</span>
</button>
<button class="mobile-view-mode-btn" data-mode="preview" aria-pressed="false" title="Preview only">
<i class="bi bi-eye"></i>
<span>Preview</span>
</button>
</div>
<div class="mobile-stats-container mb-3">
<div class="stat-item mb-2">
<i class="bi bi-clock me-1"></i> <span id="mobile-reading-time">0</span> Min Read
</div>
<div class="stat-item mb-2">
<i class="bi bi-text-paragraph me-1"></i> <span id="mobile-word-count">0</span> Words
</div>
<div class="stat-item">
<i class="bi bi-fonts me-1"></i> <span id="mobile-char-count">0</span> Chars
</div>
</div>
<div class="mobile-menu-items">
<button id="mobile-toggle-sync" class="mobile-menu-item tool-button sync-enabled border-primary" title="Toggle Sync Scrolling">
<i class="bi bi-link"></i> Sync Off
</button>
<button id="mobile-import-button" class="mobile-menu-item" title="Import from files">
<i class="bi bi-upload me-2"></i> Import from files
</button>
<button id="mobile-import-github-button" class="mobile-menu-item" title="Import from GitHub">
<i class="bi bi-github me-2"></i> Import from GitHub
</button>
<button id="mobile-export-md" class="mobile-menu-item" title="Export as Markdown">
<i class="bi bi-file-earmark-text me-2"></i> Export as Markdown
</button>
<button id="mobile-export-html" class="mobile-menu-item" title="Export as HTML">
<i class="bi bi-file-earmark-code me-2"></i> Export as HTML
</button>
<button id="mobile-export-pdf" class="mobile-menu-item" title="Export as PDF">
<i class="bi bi-file-earmark-pdf me-2"></i> Export as PDF
</button>
<button id="mobile-copy-markdown" class="mobile-menu-item" title="Copy Markdown">
<i class="bi bi-clipboard me-2"></i> Copy
</button>
<button id="mobile-share-button" class="mobile-menu-item" title="Share via URL">
<i class="bi bi-share me-2"></i> Share
</button>
<button id="mobile-theme-toggle" class="mobile-menu-item" title="Toggle Dark Mode">
<i class="bi bi-moon me-2"></i> Dark Mode
</button>
</div>
</div>
<div id="mobile-menu-overlay"></div>
</div>
</div>
</header>
<!-- Tab Bar -->
<div class="tab-bar" id="tab-bar" role="tablist" aria-label="Document tabs">
<div class="tab-list" id="tab-list"></div>
<button class="tab-reset-btn" id="tab-reset-btn" title="Reset all files" aria-label="Reset all files">
<i class="bi bi-arrow-counterclockwise"></i> Reset
</button>
</div>
<!-- Reset Confirmation Modal -->
<div id="reset-confirm-modal" class="reset-modal-overlay" role="dialog" aria-modal="true" aria-labelledby="reset-modal-title" style="display:none;">
<div class="reset-modal-box">
<p id="reset-modal-title" class="reset-modal-message">Are you sure you want to delete all files?</p>
<div class="reset-modal-actions">
<button class="reset-modal-btn reset-modal-cancel" id="reset-modal-cancel">Cancel</button>
<button class="reset-modal-btn reset-modal-confirm" id="reset-modal-confirm">Delete All</button>
</div>
</div>
</div>
<!-- Rename Modal -->
<div id="rename-modal" class="reset-modal-overlay" role="dialog" aria-modal="true" aria-labelledby="rename-modal-title" style="display:none;">
<div class="reset-modal-box">
<p id="rename-modal-title" class="reset-modal-message">Rename file</p>
<input type="text" id="rename-modal-input" class="rename-modal-input" placeholder="File name" />
<div class="reset-modal-actions">
<button class="reset-modal-btn reset-modal-cancel" id="rename-modal-cancel">Cancel</button>
<button class="reset-modal-btn reset-modal-confirm" id="rename-modal-confirm">Rename</button>
</div>
</div>
</div>
<!-- GitHub Import Modal -->
<div id="github-import-modal" class="reset-modal-overlay" role="dialog" aria-modal="true" aria-labelledby="github-import-title" style="display:none;">
<div class="reset-modal-box">
<p id="github-import-title" class="reset-modal-message">Import Markdown from GitHub</p>
<input type="url" id="github-import-url" class="rename-modal-input" placeholder="https://github.com/owner/repo/blob/main/README.md" />
<select id="github-import-file-select" class="rename-modal-input" style="display:none;"></select>
<div id="github-import-selection-toolbar" class="github-import-selection-toolbar" style="display:none;">
<span id="github-import-selected-count" class="github-import-selected-count">0 selected</span>
<button type="button" class="reset-modal-btn" id="github-import-select-all">Select All</button>
</div>
<div id="github-import-tree" class="github-import-tree" style="display:none;"></div>
<p id="github-import-error" class="github-import-error" style="display:none;"></p>
<div class="reset-modal-actions">
<button class="reset-modal-btn reset-modal-cancel" id="github-import-cancel">Cancel</button>
<button class="reset-modal-btn" id="github-import-submit">Import</button>
</div>
</div>
</div>
<div id="dropzone" class="dropzone container-fluid mt-2">
<button id="close-dropzone" class="close-btn" title="Close dropzone">
<i class="bi bi-x-lg"></i>
</button>
<p class="mb-0"><i class="bi bi-cloud-arrow-up me-2"></i>Drop your Markdown file here or click to browse</p>
</div>
<div class="content-container">
<div class="editor-pane">
<textarea id="markdown-editor" placeholder="Type or paste your Markdown here..."></textarea>
</div>
<!-- Resize Divider - Story 1.3 -->
<div class="resize-divider" role="separator" aria-orientation="vertical" aria-label="Resize panes" tabindex="0">
<div class="resize-divider-handle"></div>
</div>
<div class="preview-pane">
<div id="markdown-preview" class="markdown-body"></div>
</div>
</div>
</div>
<!-- Mermaid Zoom Modal -->
<div id="mermaid-zoom-modal" role="dialog" aria-modal="true" aria-label="Diagram zoom view">
<div class="mermaid-modal-content">
<div class="mermaid-modal-header">
<span>Diagram</span>
<button class="mermaid-modal-close" id="mermaid-modal-close" title="Close" aria-label="Close diagram modal">
<i class="bi bi-x-lg"></i>
</button>
</div>
<div class="mermaid-modal-diagram" id="mermaid-modal-diagram"></div>
<div class="mermaid-modal-controls">
<button class="mermaid-toolbar-btn" id="mermaid-modal-zoom-in" title="Zoom in">
<i class="bi bi-zoom-in"></i> Zoom In
</button>
<button class="mermaid-toolbar-btn" id="mermaid-modal-zoom-out" title="Zoom out">
<i class="bi bi-zoom-out"></i> Zoom Out
</button>
<button class="mermaid-toolbar-btn" id="mermaid-modal-zoom-reset" title="Reset zoom">
<i class="bi bi-arrows-angle-contract"></i> Reset
</button>
<button class="mermaid-toolbar-btn" id="mermaid-modal-copy" title="Copy image">
<i class="bi bi-clipboard-image"></i> Copy
</button>
<button class="mermaid-toolbar-btn" id="mermaid-modal-download-png" title="Download PNG">
<i class="bi bi-file-image"></i> PNG
</button>
<button class="mermaid-toolbar-btn" id="mermaid-modal-download-svg" title="Download SVG">
<i class="bi bi-filetype-svg"></i> SVG
</button>
</div>
</div>
</div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap/5.3.2/js/bootstrap.bundle.min.js"></script>
<script src="script.js"></script>
</body>
</html>