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  "url": "https://unifast.dev/zh-CN/docs/packages/node/img-lazy-loading/",
  "locale": "zh-CN",
  "title": "imgLazyLoading()",
  "description": "为图片添加 loading=\"lazy\" 属性以实现延迟加载。",
  "section": "packages",
  "body": "```ts\nimport { imgLazyLoading } from \"@unifast/node\";\n```\n\n## 签名\n\n```ts\nfunction imgLazyLoading(options?: ImgLazyLoadingPluginOptions): UnifastPlugin\n```\n\n## 参数\n\n### options?\n\n懒加载行为的配置\n\n| 属性 | 类型 | 默认值 | 描述 |\n|----------|------|---------|-------------|\n| `skipFirst` | `number` | `0` | 跳过前若干张图片（例如跳过首屏主图） |\n\n该插件会为匹配到的 `<img>` 元素同时添加 `loading=\"lazy\"` 和 `decoding=\"async\"` 属性，包括嵌套在其他元素内部的图片。\n\n## 用法\n\n```ts\nimport { compile, imgLazyLoading } from \"@unifast/node\";\n\nconst md = `\n![Photo 1](photo1.jpg)\n\n![Photo 2](photo2.jpg)\n\n![Photo 3](photo3.jpg)\n`;\n\nconst result = compile(md, {\n  plugins: [imgLazyLoading()],\n});\n\n// All images get loading=\"lazy\" and decoding=\"async\":\n// <img src=\"photo1.jpg\" alt=\"Photo 1\" loading=\"lazy\" decoding=\"async\">\n// <img src=\"photo2.jpg\" alt=\"Photo 2\" loading=\"lazy\" decoding=\"async\">\n// <img src=\"photo3.jpg\" alt=\"Photo 3\" loading=\"lazy\" decoding=\"async\">\n```\n\n## 示例\n\n### 跳过首张图片（首屏主图模式）\n\n页面上的第一张图片通常是首屏主图或横幅，应当立即加载。可以使用 `skipFirst` 将它排除在懒加载之外：\n\n```ts\nimport { compile, imgLazyLoading } from \"@unifast/node\";\n\nconst md = `\n![Hero banner](hero.jpg)\n\nSome introductory content...\n\n![Diagram](diagram.jpg)\n\nMore content...\n\n![Screenshot](screenshot.jpg)\n`;\n\nconst result = compile(md, {\n  plugins: [\n    imgLazyLoading({\n      skipFirst: 1,\n    }),\n  ],\n});\n\n// First image loads eagerly (no loading attribute):\n// <img src=\"hero.jpg\" alt=\"Hero banner\">\n//\n// Remaining images are lazy loaded:\n// <img src=\"diagram.jpg\" alt=\"Diagram\" loading=\"lazy\" decoding=\"async\">\n// <img src=\"screenshot.jpg\" alt=\"Screenshot\" loading=\"lazy\" decoding=\"async\">\n```\n\n### 跳过多张首屏可见图片\n\n```ts\nimport { compile, imgLazyLoading } from \"@unifast/node\";\n\nconst result = compile(md, {\n  plugins: [\n    imgLazyLoading({\n      skipFirst: 3, // skip the first 3 images\n    }),\n  ],\n});\n```",
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