sanbuphy
d35211071a
- standardize border-radius from 8px to 6px for consistent styling - adjust padding values from 1rem to 0.75rem for better visual hierarchy - remove redundant overflow-y properties for cleaner code
296 lines
6.5 KiB
Vue
296 lines
6.5 KiB
Vue
<!--
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SourceMapDemo.vue
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SourceMap原理演示
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用途：
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展示SourceMap如何将压缩后的代码映射回源代码。
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-->
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<template>
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<div class="source-map-demo">
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<div class="demo-header">
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<h3>🗺️ SourceMap 原理演示</h3>
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<p>调试压缩代码的秘密武器</p>
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</div>
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<div class="demo-content">
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<div class="code-comparison">
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<div class="code-panel source">
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<div class="panel-title">📄 源代码 (Source)</div>
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<pre class="code-block"><code>function calculateSum(a, b) {
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// 计算两个数的和
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const result = a + b;
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console.log('结果:', result);
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return result;
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}
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const sum = calculateSum(10, 20);
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console.log('总和:', sum);</code></pre>
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</div>
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<div class="mapping-arrows">
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<div class="arrow" v-for="i in 5" :key="i">
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<span class="line"></span>
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<span class="point">→</span>
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</div>
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</div>
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<div class="code-panel minified">
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<div class="panel-title">🔧 压缩后 (Minified)</div>
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<pre class="code-block"><code>function n(n,r){var t=n+r;return console.log("结果:",t),t}var r=n(10,20);console.log("总和:",r);
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// sourceMappingURL=app.js.map (指向映射文件)</code></pre>
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</div>
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</div>
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<div class="sourcemap-explanation">
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<div class="explanation-section">
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<h4>📦 SourceMap 文件内容示例</h4>
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<pre class="json-block"><code>{
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"version": 3,
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"sources": ["src/utils.js", "src/main.js"],
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"names": ["calculateSum", "a", "b", "result"],
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"mappings": "AAAA,SAASA...",
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"file": "app.min.js"
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}</code></pre>
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<ul class="field-explanation">
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<li><strong>version</strong>: SourceMap 规范版本（当前是 3）</li>
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<li><strong>sources</strong>: 原始源文件列表</li>
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<li><strong>names</strong>: 压缩前后的变量名映射</li>
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<li><strong>mappings</strong>: 位置映射信息（VLQ 编码）</li>
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<li><strong>file</strong>: 对应的压缩文件名</li>
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</ul>
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</div>
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<div class="tips-section">
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<h4>💡 使用建议</h4>
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<div class="tips-grid">
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<div class="tip-item">
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<span class="tip-icon">🚀</span>
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<div class="tip-content">
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<strong>开发环境</strong>
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<p>开启 SourceMap，方便调试</p>
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</div>
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</div>
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<div class="tip-item">
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<span class="tip-icon">🔒</span>
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<div class="tip-content">
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<strong>生产环境</strong>
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<p>不部署 .map 文件，防止源码泄露</p>
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</div>
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</div>
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<div class="tip-item">
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<span class="tip-icon">🗂️</span>
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<div class="tip-content">
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<strong>单独存放</strong>
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<p>使用 `sourceMappingURL` 指向独立服务器</p>
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</div>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="info-box">
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<p>
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<span class="icon">💡</span>
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<strong>SourceMap 工作原理：</strong>
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压缩代码时，构建工具会记录每个字符在源代码中的位置，生成 .map 文件。
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浏览器调试时，通过映射关系把压缩后的代码"还原"成源代码显示。
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注意：生产环境不要暴露 .map 文件，防止源码泄露！
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</p>
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</div>
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</div>
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</template>
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<style scoped>
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.source-map-demo {
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border: 1px solid var(--vp-c-divider);
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border-radius: 6px;
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background-color: var(--vp-c-bg-soft);
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padding: 0.75rem;
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margin: 0.5rem 0;
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font-family: var(--vp-font-family-mono);
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}
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.demo-header h3 {
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margin: 0 0 0.5rem 0;
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font-size: 1.1rem;
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}
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.demo-header p {
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margin: 0;
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color: var(--vp-c-text-2);
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font-size: 0.9rem;
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}
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.demo-content {
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margin-top: 1rem;
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}
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.code-comparison {
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display: grid;
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grid-template-columns: 1fr auto 1fr;
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gap: 0.75rem;
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margin-bottom: 1rem;
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}
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@media (max-width: 768px) {
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.code-comparison {
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grid-template-columns: 1fr;
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}
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.mapping-arrows {
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display: none;
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}
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}
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.code-panel {
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background: var(--vp-c-bg);
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border-radius: 6px;
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border: 1px solid var(--vp-c-divider);
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overflow: hidden;
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}
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.code-panel .panel-title {
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background: var(--vp-c-bg-soft);
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padding: 0.4rem 0.6rem;
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font-size: 0.8rem;
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font-weight: 600;
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border-bottom: 1px solid var(--vp-c-divider);
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}
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.code-block {
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padding: 0.6rem;
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font-size: 0.75rem;
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line-height: 1.5;
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margin: 0;
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overflow-x: auto;
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color: var(--vp-c-text-1);
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}
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.mapping-arrows {
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display: flex;
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flex-direction: column;
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justify-content: center;
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gap: 0.5rem;
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padding: 0.5rem 0;
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}
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.arrow {
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display: flex;
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align-items: center;
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justify-content: center;
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height: 20px;
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}
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.arrow .line {
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width: 20px;
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height: 1px;
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background: var(--vp-c-brand);
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}
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.arrow .point {
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color: var(--vp-c-brand);
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font-size: 0.8rem;
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margin-left: -2px;
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}
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.sourcemap-explanation {
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display: grid;
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grid-template-columns: 1fr 1fr;
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gap: 1rem;
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}
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@media (max-width: 768px) {
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.sourcemap-explanation {
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grid-template-columns: 1fr;
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}
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}
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.explanation-section,
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.tips-section {
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background: var(--vp-c-bg);
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border-radius: 6px;
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border: 1px solid var(--vp-c-divider);
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padding: 0.75rem;
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}
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.explanation-section h4,
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.tips-section h4 {
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margin: 0 0 0.75rem 0;
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font-size: 0.85rem;
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color: var(--vp-c-text-1);
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}
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.json-block {
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background: var(--vp-c-bg-soft);
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border-radius: 4px;
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padding: 0.5rem;
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font-size: 0.7rem;
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line-height: 1.4;
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overflow-x: auto;
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margin: 0 0 0.75rem 0;
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color: var(--vp-c-text-1);
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}
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.field-explanation {
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margin: 0;
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padding-left: 1rem;
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font-size: 0.8rem;
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color: var(--vp-c-text-2);
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}
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.field-explanation li {
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margin-bottom: 0.25rem;
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}
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.field-explanation strong {
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color: var(--vp-c-text-1);
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}
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.tips-grid {
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display: grid;
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gap: 0.5rem;
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}
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.tip-item {
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display: flex;
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align-items: flex-start;
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gap: 0.5rem;
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padding: 0.5rem;
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background: var(--vp-c-bg-soft);
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border-radius: 4px;
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}
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.tip-icon {
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font-size: 1.1rem;
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line-height: 1;
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}
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.tip-content strong {
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display: block;
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font-size: 0.8rem;
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margin-bottom: 0.1rem;
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color: var(--vp-c-text-1);
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}
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.tip-content p {
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margin: 0;
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font-size: 0.75rem;
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color: var(--vp-c-text-2);
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line-height: 1.3;
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}
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.info-box {
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background-color: var(--vp-c-bg-alt);
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padding: 0.75rem;
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border-radius: 6px;
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font-size: 0.85rem;
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line-height: 1.4;
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color: var(--vp-c-text-2);
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}
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.info-box .icon {
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margin-right: 0.5rem;
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}
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</style>
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