Project: rehypejs/rehype-infer-title-meta

Package: rehype-infer-title-meta@1.1.0

  1. Dependents: 0
  2. rehype plugin to infer file metadata from the main title of a document
  1. unified 178
  2. plugin 138
  3. html 121
  4. rehype 89
  5. hast 74
  6. rehype-plugin 60
  7. file 34
  8. meta 9
  9. title 4


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rehype plugin to infer the title of a document.


What is this?

This package is a unified (rehype) plugin to infer the title of a document.

unified is a project that transforms content with abstract syntax trees (ASTs). rehype adds support for HTML to unified. vfile is the virtual file interface used in unified. hast is the HTML AST that rehype uses. This is a rehype plugin that inspects hast and adds metadata to vfiles.

When should I use this?

This plugin is particularly useful in combination with rehype-meta. When both are used together, the <title> is populated with the document’s title.


This package is ESM only. In Node.js (version 12.20+, 14.14+, 16.0+, or 18.0+), install with npm:

npm install rehype-infer-title-meta

In Deno with esm.sh:

import rehypeInferTitleMeta from 'https://esm.sh/rehype-infer-title-meta@1'

In browsers with esm.sh:

<script type="module">
  import rehypeInferTitleMeta from 'https://esm.sh/rehype-infer-title-meta@1?bundle'


Say our module example.js looks as follows:

import {unified} from 'unified'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import rehypeInferTitleMeta from 'rehype-infer-title-meta'
import rehypeDocument from 'rehype-document'
import rehypeMeta from 'rehype-meta'
import rehypeFormat from 'rehype-format'
import rehypeStringify from 'rehype-stringify'

const file = await unified()
  .process('# Hello, world!')


…now running node example.js yields:

{meta: {title: 'Hello, world!'}}
<!doctype html>
<html lang="en">
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>Hello, world!</title>
    <h1>Hello, world!</h1>


This package exports no identifiers. The default export is rehypeInferTitleMeta.

unified().use(rehypeInferTitleMeta, options?)

Infer the title from a document as file metadata. The result is stored on file.data.meta.title.


Configuration (optional).


CSS selector to the title (string, default: 'h1'). Can be a selector list ('title, h1, .main-heading'), in which case the first element in the tree that matches is used.


This package is fully typed with TypeScript. The additional type Options is exported.

It also registers the file.data.meta field with vfile. If you’re working with the file, make sure to import this plugin somewhere in your types, as that registers the new field on the file.

 * @typedef {import('rehype-infer-title-meta')}

import {VFile} from 'vfile'

const file = new VFile()

console.log(file.data.meta.title) //=> TS now knows that this is a `string?`.


Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, 16.0+, and 18.0+. Our projects sometimes work with older versions, but this is not guaranteed.

This plugin works with rehype-parse version 3+, rehype-stringify version 3+, rehype version 4+, and unified version 6+.


Use of rehype-infer-title-meta is safe.


See contributing.md in rehypejs/.github for ways to get started. See support.md for ways to get help.

This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.


MIT © Titus Wormer