{
  "url": "https://unifast.dev/ja/docs/packages/node/toc/",
  "locale": "ja",
  "title": "toc()",
  "description": "Markdown/MDX から見出しを抽出して CompileResult.toc に格納する TOC プラグインを生成します。",
  "section": "packages",
  "body": "```ts\n\n```\n\n## シグネチャ\n\n```ts\nfunction toc(options?: TocPluginOptions): UnifastPlugin\n```\n\n## パラメータ\n\n### options?\n\nTOC 抽出の設定\n\n| プロパティ | 型 | デフォルト | 説明 |\n|----------|------|---------|-------------|\n| `maxDepth` | `number` | `3` | 含める見出しの最大深さ (1 〜 6)。3 の場合は h1、h2、h3 を含みます。 |\n\n## 使い方\n\n```ts\n\nconst result = compile(md, {\n  plugins: [\n    toc({\n      maxDepth: 3,\n    }),\n  ],\n});\n\nconsole.log(result.toc);\n// [\n//   { depth: 1, text: \"Introduction\", slug: \"introduction\" },\n//   { depth: 2, text: \"Getting Started\", slug: \"getting-started\" },\n//   { depth: 3, text: \"Installation\", slug: \"installation\" },\n// ]\n```\n\n## 使用例\n\n### 基本的な見出しの抽出\n\n```ts\n\nconst md = `# Introduction\n\n## Getting Started\n\n### Installation\n\n## API Reference\n\n### compile()\n\n### hastToHtml()`;\n\nconst result = compile(md, { plugins: [toc()] });\n\nconsole.log(result.toc);\n// [\n//   { depth: 1, text: \"Introduction\", slug: \"introduction\" },\n//   { depth: 2, text: \"Getting Started\", slug: \"getting-started\" },\n//   { depth: 3, text: \"Installation\", slug: \"installation\" },\n//   { depth: 2, text: \"API Reference\", slug: \"api-reference\" },\n//   { depth: 3, text: \"compile()\", slug: \"compile\" },\n//   { depth: 3, text: \"hastToHtml()\", slug: \"hasttohtml\" },\n// ]\n```\n\n### 深さを制限する\n\n```ts\n\nconst result = compile(md, {\n  plugins: [toc({ maxDepth: 2 })],\n});\n\nconsole.log(result.toc);\n// Only h1 and h2 headings are included\n// [\n//   { depth: 1, text: \"Introduction\", slug: \"introduction\" },\n//   { depth: 2, text: \"Getting Started\", slug: \"getting-started\" },\n//   { depth: 2, text: \"API Reference\", slug: \"api-reference\" },\n// ]\n```\n\n### TOC ナビゲーションをレンダリングする\n\n```tsx\n\nconst result = compile(md, { plugins: [toc()] });\n\nfunction TableOfContents() {\n  return (\n    <nav>\n      <ul>\n        {result.toc.map((entry) => (\n          <li key={entry.slug} style={{ marginLeft: (entry.depth - 1) * 16 }}>\n            <a href={`#${entry.slug}`}>{entry.text}</a>\n          </li>\n        ))}\n      </ul>\n    </nav>\n  );\n}\n```",
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