Hotodogo | Snippets: MarkdownLive

CSS Before Head

<script src="https://cdn.jsdelivr.net/npm/marked/marked.min.js"></script>
    <script src="https://cdn.jsdelivr.net/npm/html2canvas@1.4.1/dist/html2canvas.min.js"></script>

HTML Head

* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
        }

        /* 基础变量 - 亮色主题 */
        :root {
            --body-bg: #f5f7fa;
            --top-bar-bg: #4299e1;
            --top-bar-text: #ffffff;
            --btn-bg: #ffffff;
            --btn-text: #4299e1;
            --btn-hover: #f0f7ff;
            --btn-disabled: #a0aec0;
            --dropdown-bg: #ffffff;
            --dropdown-border: #e2e8f0;
            --dropdown-hover: #f5f7fa;
            --panel-bg: #ffffff;
            --panel-border: #e2e8f0;
            --panel-shadow: 0 1px 3px rgba(0,0,0,0.05);
            --panel-title-bg: #f8f9fa;
            --panel-title-text: #2d3748;
            --input-bg: #ffffff;
            --input-text: #2d3748;
            --input-placeholder: #718096;
            --preview-text: #4a5568;
            --preview-title: #2d3748;
            --preview-title-border: #e2e8f0;
            --code-bg: #f7fafc;
            --code-text: #e53e3e;
            --pre-border: #e2e8f0;
            --blockquote-border: #4299e1;
            --blockquote-text: #718096;
            --table-border: #e2e8f0;
            --table-th-bg: #f7fafc;
            --table-th-text: #2d3748;
            --scrollbar-track: #f5f7fa;
            --scrollbar-thumb: #e2e8f0;
            --scrollbar-thumb-hover: #cbd5e1;
            /* 导出容器变量 */
            --export-bg: #ffffff;
            --export-text: #2d3748;
            --export-title: #2d3748;
            --export-title-border: #e2e8f0;
            --export-code-bg: #f7fafc;
            --export-code-text: #e53e3e;
        }

        /* 暗色主题变量 */
        [data-theme="dark"] {
            --body-bg: #1a1a2e;
            --top-bar-bg: #16213e;
            --top-bar-text: #e6e6ff;
            --btn-bg: #0f3460;
            --btn-text: #e6e6ff;
            --btn-hover: #1a508b;
            --btn-disabled: #2c3e50;
            --dropdown-bg: #12121f;
            --dropdown-border: #2c2c44;
            --dropdown-hover: #16213e;
            --panel-bg: #12121f;
            --panel-border: #2c2c44;
            --panel-shadow: 0 1px 3px rgba(0,0,0,0.3);
            --panel-title-bg: #16213e;
            --panel-title-text: #e6e6ff;
            --input-bg: #12121f;
            --input-text: #d1d1e0;
            --input-placeholder: #646480;
            --preview-text: #d1d1e0;
            --preview-title: #a9d1ff;
            --preview-title-border: #2c2c44;
            --code-bg: #16213e;
            --code-text: #ff7675;
            --pre-border: #2c2c44;
            --blockquote-border: #0f3460;
            --blockquote-text: #94a3b8;
            --table-border: #2c2c44;
            --table-th-bg: #16213e;
            --table-th-text: #a9d1ff;
            --scrollbar-track: #12121f;
            --scrollbar-thumb: #2c2c44;
            --scrollbar-thumb-hover: #3d3d66;
            /* 导出容器变量 */
            --export-bg: #12121f;
            --export-text: #d1d1e0;
            --export-title: #a9d1ff;
            --export-title-border: #2c2c44;
            --export-code-bg: #16213e;
            --export-code-text: #ff7675;
        }

        body {
            background-color: var(--body-bg);
            height: 100vh;
            overflow: hidden;
            transition: background-color 0.3s ease;
        }

        /* 顶部固定栏 */
        .top-bar {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 50px;
            background-color: var(--top-bar-bg);
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 12px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
            z-index: 100;
            transition: all 0.3s ease;
        }

        .top-bar .title {
            color: var(--top-bar-text);
            font-size: 1rem;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 55%;
        }

        .top-bar .func-group {
            display: flex;
            gap: 6px;
            align-items: center;
            position: relative;
        }

        /* 小巧的主题切换按钮 */
        #theme-toggle {
            padding: 4px 8px;
            border: none;
            border-radius: 3px;
            background-color: var(--btn-bg);
            color: var(--btn-text);
            font-size: 0.75rem;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        /* 导出下拉按钮 */
        #export-dropdown-btn {
            padding: 4px 10px;
            border: none;
            border-radius: 3px;
            background-color: var(--btn-bg);
            color: var(--btn-text);
            font-size: 0.75rem;
            cursor: pointer;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            gap: 4px;
        }

        #theme-toggle:hover, #export-dropdown-btn:hover {
            background-color: var(--btn-hover);
        }

        /* 导出下拉菜单 */
        .export-dropdown {
            position: absolute;
            top: calc(100% + 4px);
            right: 0;
            width: 120px;
            background-color: var(--dropdown-bg);
            border: 1px solid var(--dropdown-border);
            border-radius: 4px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
            list-style: none;
            display: none;
            z-index: 101;
            transition: all 0.3s ease;
        }

        .export-dropdown.show {
            display: block;
        }

        .export-dropdown li {
            padding: 6px 10px;
            font-size: 0.75rem;
            color: var(--input-text);
            cursor: pointer;
            transition: background-color 0.2s ease;
        }

        .export-dropdown li:hover {
            background-color: var(--dropdown-hover);
        }

        .loading-tip {
            color: var(--top-bar-text);
            font-size: 0.75rem;
            display: none;
            margin-left: 6px;
            white-space: nowrap;
        }

        /* 桌面端适配 */
        @media (min-width: 768px) {
            .top-bar {
                height: 60px;
                padding: 0 20px;
            }
            .top-bar .title {
                font-size: 1.2rem;
                max-width: unset;
            }
            #theme-toggle {
                padding: 6px 10px;
                font-size: 0.85rem;
            }
            #export-dropdown-btn {
                padding: 6px 14px;
                font-size: 0.85rem;
            }
            .loading-tip {
                font-size: 0.85rem;
            }
            .export-dropdown {
                width: 140px;
            }
            .export-dropdown li {
                padding: 8px 12px;
                font-size: 0.85rem;
            }
        }

        /* 主体编辑区域 */
        .main-container {
            position: absolute;
            top: 50px;
            left: 0;
            right: 0;
            bottom: 0;
            padding: 10px;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .editor-wrapper {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 10px;
            border-radius: 8px;
            overflow: hidden;
        }

        @media (min-width: 768px) {
            .editor-wrapper {
                flex-direction: row;
            }
        }

        .editor-panel, .preview-panel {
            flex: 1;
            background-color: var(--panel-bg);
            border: 2px solid var(--panel-border);
            border-radius: 6px;
            overflow: hidden;
            box-shadow: var(--panel-shadow);
            transition: all 0.3s ease;
        }

        .panel-title {
            height: 40px;
            line-height: 40px;
            padding: 0 15px;
            background-color: var(--panel-title-bg);
            border-bottom: 1px solid var(--panel-border);
            color: var(--panel-title-text);
            font-size: 0.95rem;
            font-weight: 500;
            transition: all 0.3s ease;
        }

        #markdown-input {
            width: 100%;
            height: calc(100% - 40px);
            border: none;
            outline: none;
            padding: 20px;
            font-size: 1rem;
            resize: none;
            font-family: "Consolas", "Monaco", monospace;
            line-height: 1.6;
            background-color: var(--input-bg);
            color: var(--input-text);
            overflow-y: auto;
            transition: all 0.3s ease;
        }

        #markdown-input::placeholder {
            color: var(--input-placeholder);
        }

        #preview-area {
            width: 100%;
            height: calc(100% - 40px);
            padding: 20px;
            overflow-y: auto;
            color: var(--preview-text);
            transition: all 0.3s ease;
        }

        /* 导出容器 */
        #full-preview-container {
            position: absolute;
            top: -9999px;
            left: -9999px;
            width: 900px;
            max-width: 100%;
            padding: 50px;
            background-color: var(--export-bg);
            color: var(--export-text);
            transition: all 0.3s ease;
        }

        /* Markdown通用样式 */
        .markdown-style h1 {
            font-size: 2rem;
            margin: 20px 0;
            color: var(--preview-title);
            border-bottom: 1px solid var(--preview-title-border);
            padding-bottom: 10px;
        }
        .markdown-style h2 {
            font-size: 1.6rem;
            margin: 18px 0;
            color: var(--preview-title);
        }
        .markdown-style h3 {
            font-size: 1.3rem;
            margin: 15px 0;
            color: var(--preview-title);
        }
        .markdown-style p {
            line-height: 1.8;
            margin: 10px 0;
            color: var(--preview-text);
            font-size: 1rem;
        }
        .markdown-style ul, .markdown-style ol {
            padding-left: 30px;
            margin: 10px 0;
            color: var(--preview-text);
            line-height: 1.8;
        }
        .markdown-style code {
            background-color: var(--code-bg);
            padding: 3px 6px;
            border-radius: 4px;
            color: var(--code-text);
            font-family: "Consolas", monospace;
            font-size: 0.95rem;
        }
        .markdown-style pre {
            background-color: var(--code-bg);
            padding: 20px;
            border-radius: 8px;
            overflow-x: auto;
            margin: 15px 0;
            border: 1px solid var(--pre-border);
        }
        .markdown-style pre code {
            color: var(--preview-text);
            padding: 0;
        }
        .markdown-style blockquote {
            border-left: 4px solid var(--blockquote-border);
            padding-left: 15px;
            margin: 15px 0;
            color: var(--blockquote-text);
        }
        .markdown-style table {
            border-collapse: collapse;
            width: 100%;
            margin: 20px 0;
        }
        .markdown-style th, .markdown-style td {
            border: 1px solid var(--table-border);
            padding: 10px 15px;
            text-align: left;
        }
        .markdown-style th {
            background-color: var(--table-th-bg);
            color: var(--table-th-text);
        }

        /* 导出容器Markdown样式 */
        #full-preview-container h1 {
            color: var(--export-title);
            border-bottom-color: var(--export-title-border);
        }
        #full-preview-container h2, #full-preview-container h3 {
            color: var(--export-title);
        }
        #full-preview-container code {
            background-color: var(--export-code-bg);
            color: var(--export-code-text);
        }

        /* 滚动条美化 */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--scrollbar-track);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb {
            background: var(--scrollbar-thumb);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--scrollbar-thumb-hover);
        }

CSS After Head

JS Before HTML Body

data-theme="dark"

HTML Body Attrs

<!-- 顶部固定栏 -->
    <div class="top-bar">
        <div class="title">MarkdownLive</div>
        <div class="func-group">
            <button id="theme-toggle">Light</button>
            <button id="export-dropdown-btn">Export ▼</button>
            <ul class="export-dropdown" id="export-dropdown">
                <li id="export-md">MD</li>
                <li id="export-img">PNG</li>
                <li id="export-html">HTML</li>
            </ul>
            <span class="loading-tip" id="loading-tip">Generating...</span>
        </div>
    </div>

    <!-- 主体区域 -->
    <div class="main-container">
        <div class="editor-wrapper">
            <div class="editor-panel">
                <div class="panel-title">Markdown</div>
                <textarea id="markdown-input" placeholder="请输入Markdown内容，右侧实时预览..."></textarea>
            </div>
            <div class="preview-panel">
                <div class="panel-title">Preview</div>
                <div id="preview-area" class="markdown-style">
                    <p style="text-align: center; color: var(--input-placeholder); margin-top: 80px;">输入内容后此处实时渲染</p>
                </div>
            </div>
        </div>
    </div>

    <!-- 完整导出容器 -->
    <div id="full-preview-container" class="markdown-style"></div>

HTML Body

HTML Foot

// 获取DOM元素
        const body = document.body;
        const themeToggle = document.getElementById('theme-toggle');
        const exportDropdownBtn = document.getElementById('export-dropdown-btn');
        const exportDropdown = document.getElementById('export-dropdown');
        const exportImg = document.getElementById('export-img');
        const exportMD = document.getElementById('export-md');
        const exportHtml = document.getElementById('export-html');
        const markdownInput = document.getElementById('markdown-input');
        const previewArea = document.getElementById('preview-area');
        const fullPreviewContainer = document.getElementById('full-preview-container');
        const loadingTip = document.getElementById('loading-tip');

        // 主题切换逻辑
        let isDark = body.getAttribute('data-theme') == "dark";
        themeToggle.addEventListener('click', () => {
            isDark = !isDark;
            let setattr = isDark ? 'dark' : 'light';
            let settext = isDark ? 'Light' : 'Dark';
            body.setAttribute('data-theme', setattr);
            themeToggle.textContent = settext;
            syncContent(markdownInput.value.trim());
        });

        // 下拉菜单显示/隐藏
        exportDropdownBtn.addEventListener('click', (e) => {
            e.stopPropagation();
            exportDropdown.classList.toggle('show');
        });
        document.addEventListener('click', () => {
            exportDropdown.classList.remove('show');
        });
        exportDropdown.addEventListener('click', (e) => {
            e.stopPropagation();
        });

        // 实时同步Markdown内容
        markdownInput.addEventListener('input', () => {
            syncContent(markdownInput.value.trim());
        });

        function syncContent(content) {
            if (content) {
                const html = marked.parse(content);
                previewArea.innerHTML = html;
                fullPreviewContainer.innerHTML = html;
            } else {
                previewArea.innerHTML = `<p style="text-align: center; color: var(--input-placeholder); margin-top: 80px;">输入内容后此处实时渲染</p>`;
                fullPreviewContainer.innerHTML = '';
            }
        }

        // 显示/隐藏加载提示
        function showLoading() {
            loadingTip.style.display = 'block';
            exportDropdownBtn.disabled = true;
            themeToggle.disabled = true;
        }
        function hideLoading() {
            loadingTip.style.display = 'none';
            exportDropdownBtn.disabled = false;
            themeToggle.disabled = false;
            exportDropdown.classList.remove('show');
        }

        // 1. 导出长图
        exportImg.addEventListener('click', async () => {
            const content = markdownInput.value.trim();
            if (!content) {
                alert('请先输入Markdown内容！');
                return;
            }
            showLoading();
            try {
                await new Promise(resolve => setTimeout(resolve, 400));
                const canvas = await html2canvas(fullPreviewContainer, {
                    scale: 2,
                    useCORS: true,
                    backgroundColor: getComputedStyle(fullPreviewContainer).backgroundColor
                });
                const link = document.createElement('a');
                const theme = isDark ? 'dark' : 'light';
                link.download = `markdown-img-${theme}-${Date.now()}.png`;
                link.href = canvas.toDataURL('image/png', 1.0);
                link.click();
                alert(`已导出${theme}主题长图！`);
            } catch (err) {
                alert(`长图导出失败：${err.message}`);
            }
            hideLoading();
        });

        // 2. 导出Markdown为MD
        exportMD.addEventListener('click', () => {
            const content = markdownInput.value.trim();
            if (!content) {
                alert('请先输入Markdown内容！');
                return;
            }
            showLoading();
            try {
                const blob = new Blob([content], { type: 'text/plain;charset=utf-8' });
                const link = document.createElement('a');
                link.download = `markdown-text-${Date.now()}.md`;
                link.href = URL.createObjectURL(blob);
                link.click();
                URL.revokeObjectURL(link.href);
                alert('MD文件导出成功！');
            } catch (err) {
                alert(`MD导出失败：${err.message}`);
            }
            hideLoading();
        });

        // 3. 导出预览为HTML
        exportHtml.addEventListener('click', () => {
            const content = markdownInput.value.trim();
            if (!content) {
                alert('请先输入Markdown内容！');
                return;
            }
            showLoading();
            try {
                // 获取当前主题样式，生成完整HTML
                const theme = isDark ? 'dark' : 'light';
                const htmlContent = `
<!DOCTYPE html>
<html lang="zh-CN" data-theme="${theme}">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Markdown导出HTML</title>
    <style>
        :root {
            --text: #4a5568;
            --title: #2d3748;
            --code-bg: #f7fafc;
            --code-text: #e53e3e;
            --border: #e2e8f0;
            --th-bg: #f7fafc;
        }
        [data-theme="dark"] {
            --text: #d1d1e0;
            --title: #a9d1ff;
            --code-bg: #16213e;
            --code-text: #ff7675;
            --border: #2c2c44;
            --th-bg: #16213e;
        }
        body {
            background: ${isDark ? '#12121f' : '#ffffff'};
            color: var(--text);
            padding: 50px;
            max-width: 900px;
            margin: 0 auto;
            font-family: "Segoe UI", "PingFang SC", sans-serif;
            line-height: 1.8;
        }
        h1 {
            color: var(--title);
            border-bottom: 1px solid var(--border);
            padding-bottom: 10px;
        }
        h2, h3 {
            color: var(--title);
        }
        code {
            background: var(--code-bg);
            padding: 3px 6px;
            border-radius: 4px;
            color: var(--code-text);
            font-family: Consolas, monospace;
        }
        pre {
            background: var(--code-bg);
            padding: 20px;
            border-radius: 8px;
            border: 1px solid var(--border);
            overflow-x: auto;
        }
        pre code {
            padding: 0;
            color: var(--text);
        }
        blockquote {
            border-left: 4px solid ${isDark ? '#0f3460' : '#4299e1'};
            padding-left: 15px;
            color: ${isDark ? '#94a3b8' : '#718096'};
        }
        table {
            border-collapse: collapse;
            width: 100%;
        }
        th, td {
            border: 1px solid var(--border);
            padding: 10px 15px;
        }
        th {
            background: var(--th-bg);
            color: var(--title);
        }
    </style>
</head>
<body>
    ${marked.parse(content)}
</body>
</html>
                `;
                const blob = new Blob([htmlContent], { type: 'text/html;charset=utf-8' });
                const link = document.createElement('a');
                link.download = `markdown-html-${theme}-${Date.now()}.html`;
                link.href = URL.createObjectURL(blob);
                link.click();
                URL.revokeObjectURL(link.href);
                alert(`已导出${theme}主题HTML文件！`);
            } catch (err) {
                alert(`HTML导出失败：${err.message}`);
            }
            hideLoading();
        });

JS After HTML Body