PostHTML hfill

PostHTML hfill lets you use contextual headings in HTML, like the proposed <h> element.

<!-- before -->

<x-h>Heading</x-h>
<p>Content...</p>
<section>
  <x-h>Heading</x-h>
  <p>Content...</p>
  <section>
    <x-h>X Heading</x-h>
    <p>Content...</p>
  </section>
</section>
<section>
  <x-h>Heading</x-h>
  <p>Content...</p>
</section>

<!-- after -->

<x-h role="heading" aria-level="1">Heading</x-h>
<p>Content...</p>
<section>
  <x-h role="heading" aria-level="2">Heading</x-h>
  <p>Content...</p>
  <section>
    <x-h role="heading" aria-level="3">X Heading</x-h>
    <p>Content...</p>
  </section>
</section>
<section>
  <x-h role="heading" aria-level="2">Heading</x-h>
  <p>Content...</p>
</section>

The default <x-h> element is used to prevent stomping on the native namespace. This plugin is intended to produce contextual headings in JavaScript-free experiences, and may improve seach engine crawling. For dynamic usage, see hfill. For a CSS preprocessing option, see postcss-hfill.

Options

tag

Type: String
Default: "x-h"

The tag used by contextual headings.

Usage

Add PostHTML hfill to your build tool:

npm install posthtml-hfill --save-dev

Node

Use PostHTML hfill to process your HTML:

require('posthtml-hfill').process(YOUR_HTML, { /* options */ });

PostHTML

Add PostHTML to your build tool:

npm install posthtml --save-dev

Use PostHTML hfill as a plugin:

posthtml([
	require('posthtml-hfill')({ /* options */ })
]).process(YOUR_HTML, /* options */);

Gulp

Add Gulp PostHTML to your build tool:

npm install gulp-posthtml --save-dev

Use PostHTML hfill in your Gulpfile:

var posthtml = require('gulp-posthtml');

gulp.task('html', function () {
	return gulp.src('./src/*.html').pipe(
		posthtml([
			require('posthtml-hfill')({ /* options */ })
		])
	).pipe(
		gulp.dest('.')
	);
});

Grunt

Add Grunt PostHTML to your build tool:

npm install grunt-posthtml --save-dev

Use PostHTML hfill in your Gruntfile:

grunt.loadNpmTasks('grunt-posthtml');

grunt.initConfig({
	posthtml: {
		options: {
			use: [
				require('posthtml-hfill')({ /* options */ })
			]
		},
		dist: {
			src: '*.html'
		}
	}
});