rehype plugin to infer the title of a document.
- What is this?
- When should I use this?
- Install
- Use
- API
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- License
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.
This plugin is particularly useful in combination with
rehype-document or 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 16+), install with npm:
npm install rehype-infer-title-metaIn Deno with esm.sh:
import rehypeInferTitleMeta from 'https://esm.sh/rehype-infer-title-meta@2'In browsers with esm.sh:
<script type="module">
import rehypeInferTitleMeta from 'https://esm.sh/rehype-infer-title-meta@2?bundle'
</script>Say our module example.js looks as follows:
import rehypeDocument from 'rehype-document'
import rehypeFormat from 'rehype-format'
import rehypeInferTitleMeta from 'rehype-infer-title-meta'
import rehypeStringify from 'rehype-stringify'
import remarkParse from 'remark-parse'
import remarkRehype from 'remark-rehype'
import {unified} from 'unified'
const file = await unified()
.use(remarkParse)
.use(remarkRehype)
.use(rehypeInferTitleMeta)
.use(rehypeDocument)
.use(rehypeFormat)
.use(rehypeStringify)
.process('# Hello, world!')
console.log(file.data)
console.log(String(file))…now running node example.js yields:
{meta: {title: 'Hello, world!'}}<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Hello, world!</title>
<meta content="width=device-width, initial-scale=1" name="viewport">
</head>
<body>
<h1>Hello, world!</h1>
</body>
</html>This package exports no identifiers.
The default export is rehypeInferTitleMeta.
Infer file metadata from the main title of a document.
The result is stored on file.data.meta.title.
options(Options, optional) — configuration
Transform (Transformer).
Configuration (TypeScript type).
selector(string, default:'h1') — CSS selector to the title; can be a selector list (such as'title, h1, .main-heading'), in which case the first element in the tree that matches is used
This package is fully typed with TypeScript.
It exports the additional type Options.
It also registers file.data.meta with vfile.
If you’re working with the file, make sure to import this plugin somewhere in
your types, as that registers the new fields 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 maintained versions of Node.js.
When we cut a new major release, we drop support for unmaintained versions of
Node.
This means we try to keep the current release line,
rehype-infer-title-meta@^2, compatible with Node.js 16.
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.
rehype-document— wrap a fragment in a documentrehype-meta— add metadata to the head of a documentunified-infer-git-meta— infer file metadata from Gitrehype-infer-description-meta— infer file metadata from the description of a documentrehype-infer-reading-time-meta— infer file metadata from the reading time of a document
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.
