{
  "url": "https://unifast.dev/docs/packages/node/code-meta/",
  "locale": "en",
  "title": "codeMeta()",
  "description": "Parse code fence meta strings into data attributes on code blocks.",
  "section": "packages",
  "body": "```ts\nimport { codeMeta } from \"@unifast/node\";\n```\n\n## Signature\n\n```ts\nfunction codeMeta(): UnifastPlugin\n```\n\n## Parameters\n\nNone.\n\n## Usage\n\n```ts\nimport { compile, codeMeta } from \"@unifast/node\";\n\nconst md = `\\`\\`\\`js title=\"example.js\"\nconsole.log(\"hello\");\n\\`\\`\\``;\n\nconst result = compile(md, {\n  plugins: [codeMeta()],\n});\n// The <pre> element gets data-title=\"example.js\"\n```\n\n## Examples\n\n### Basic meta parsing\n\nThe `codeMeta()` plugin parses the meta string after the language identifier in fenced code blocks and converts recognized keys into `data-*` attributes on the `<pre>` element:\n\n```ts\nimport { compile, codeMeta } from \"@unifast/node\";\n\nconst md = `\\`\\`\\`js title=\"app.ts\"\nconst x = 1;\n\\`\\`\\``;\n\nconst result = compile(md, { plugins: [codeMeta()] });\nconsole.log(result.output);\n// <pre data-lang=\"js\" data-title=\"app.ts\"><code class=\"language-js\">const x = 1;\n// </code></pre>\n```\n\n### Multiple meta attributes\n\nYou can combine multiple meta attributes such as `title`, `{1,3-5}` for line highlighting, `showLineNumbers`, `diff`, and `wordWrap`:\n\n```ts\nimport { compile, codeMeta } from \"@unifast/node\";\n\nconst md = `\\`\\`\\`ts title=\"server.ts\" {1,3} showLineNumbers\nimport express from \"express\";\nconst app = express();\napp.listen(3000);\n\\`\\`\\``;\n\nconst result = compile(md, { plugins: [codeMeta()] });\n// The <pre> element receives:\n//   data-title=\"server.ts\"\n//   Lines 1 and 3 get data-highlighted attributes\n//   showLineNumbers is recognized as a boolean flag\n```",
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