{
  "url": "https://unifast.dev/ja/docs/packages/core/extract-text/",
  "locale": "ja",
  "title": "extractText()",
  "description": "HAST ノードからすべてのテキストコンテンツを再帰的に抽出します。",
  "section": "packages",
  "body": "```ts\nimport { extractText } from \"@unifast/core\";\n```\n\n## シグネチャ\n\n```ts\nfunction extractText(node: HastNode): string\n```\n\n## パラメータ\n\n### node\n\n| プロパティ | 型 | デフォルト | 説明 |\n|----------|------|---------|-------------|\n| `type` | `string` | — | ノードの種別 (`\"root\"`、`\"element\"`、`\"text\"` など) |\n| `children` | `HastNode[]` | — | 子ノード (`\"root\"` と `\"element\"` 型の場合) |\n| `value` | `string` | — | テキストコンテンツ (`\"text\"` 型の場合) |\n\n## 戻り値\n\n`string` — ノードとその子孫から連結されたすべてのテキストコンテンツです。\n\n## 使い方\n\n```ts\nimport { extractText } from \"@unifast/core\";\nimport type { HastElement } from \"@unifast/core\";\n\nconst element: HastElement = {\n  type: \"element\",\n  tagName: \"p\",\n  properties: {},\n  children: [\n    { type: \"text\", value: \"Hello \" },\n    {\n      type: \"element\",\n      tagName: \"strong\",\n      properties: {},\n      children: [{ type: \"text\", value: \"world\" }],\n    },\n  ],\n};\n\nconst text = extractText(element);\n\nconsole.log(text);\n// Hello world\n```\n\n## 使用例\n\n### シンプルな要素からの抽出\n\n```ts\nimport { extractText } from \"@unifast/core\";\nimport type { HastElement } from \"@unifast/core\";\n\nconst heading: HastElement = {\n  type: \"element\",\n  tagName: \"h1\",\n  properties: { id: \"title\" },\n  children: [{ type: \"text\", value: \"Getting Started\" }],\n};\n\nconsole.log(extractText(heading));\n// Getting Started\n```\n\n### ネストされた要素からの抽出\n\n```ts\nimport { extractText } from \"@unifast/core\";\nimport type { HastElement } from \"@unifast/core\";\n\nconst paragraph: HastElement = {\n  type: \"element\",\n  tagName: \"p\",\n  properties: {},\n  children: [\n    { type: \"text\", value: \"This is \" },\n    {\n      type: \"element\",\n      tagName: \"em\",\n      properties: {},\n      children: [\n        { type: \"text\", value: \"deeply \" },\n        {\n          type: \"element\",\n          tagName: \"strong\",\n          properties: {},\n          children: [{ type: \"text\", value: \"nested\" }],\n        },\n      ],\n    },\n    { type: \"text\", value: \" content.\" },\n  ],\n};\n\nconsole.log(extractText(paragraph));\n// This is deeply nested content.\n```\n\n### 空の要素\n\n```ts\nimport { extractText } from \"@unifast/core\";\nimport type { HastElement } from \"@unifast/core\";\n\nconst emptyDiv: HastElement = {\n  type: \"element\",\n  tagName: \"div\",\n  properties: {},\n  children: [],\n};\n\nconsole.log(extractText(emptyDiv));\n// (empty string)\n```\n\n### 見出しスラグの生成\n\n```ts\nimport { extractText } from \"@unifast/core\";\nimport type { HastElement } from \"@unifast/core\";\n\nconst heading: HastElement = {\n  type: \"element\",\n  tagName: \"h2\",\n  properties: {},\n  children: [\n    { type: \"text\", value: \"API \" },\n    {\n      type: \"element\",\n      tagName: \"code\",\n      properties: {},\n      children: [{ type: \"text\", value: \"Reference\" }],\n    },\n  ],\n};\n\nconst slug = extractText(heading).toLowerCase().replace(/\\s+/g, \"-\");\n\nconsole.log(slug);\n// api-reference\n```",
  "alternates": [
    {
      "locale": "en",
      "url": "https://unifast.dev/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/docs/packages/core/extract-text.json"
    },
    {
      "locale": "ja",
      "url": "https://unifast.dev/ja/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/ja/docs/packages/core/extract-text.json"
    },
    {
      "locale": "zh-CN",
      "url": "https://unifast.dev/zh-CN/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/zh-CN/docs/packages/core/extract-text.json"
    },
    {
      "locale": "zh-TW",
      "url": "https://unifast.dev/zh-TW/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/zh-TW/docs/packages/core/extract-text.json"
    },
    {
      "locale": "ko",
      "url": "https://unifast.dev/ko/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/ko/docs/packages/core/extract-text.json"
    },
    {
      "locale": "fr",
      "url": "https://unifast.dev/fr/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/fr/docs/packages/core/extract-text.json"
    },
    {
      "locale": "it",
      "url": "https://unifast.dev/it/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/it/docs/packages/core/extract-text.json"
    },
    {
      "locale": "es",
      "url": "https://unifast.dev/es/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/es/docs/packages/core/extract-text.json"
    },
    {
      "locale": "pt-BR",
      "url": "https://unifast.dev/pt-BR/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/pt-BR/docs/packages/core/extract-text.json"
    },
    {
      "locale": "de",
      "url": "https://unifast.dev/de/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/de/docs/packages/core/extract-text.json"
    },
    {
      "locale": "ru",
      "url": "https://unifast.dev/ru/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/ru/docs/packages/core/extract-text.json"
    },
    {
      "locale": "hi",
      "url": "https://unifast.dev/hi/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/hi/docs/packages/core/extract-text.json"
    },
    {
      "locale": "id",
      "url": "https://unifast.dev/id/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/id/docs/packages/core/extract-text.json"
    },
    {
      "locale": "tr",
      "url": "https://unifast.dev/tr/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/tr/docs/packages/core/extract-text.json"
    },
    {
      "locale": "vi",
      "url": "https://unifast.dev/vi/docs/packages/core/extract-text/",
      "api": "https://unifast.dev//api/vi/docs/packages/core/extract-text.json"
    }
  ]
}