text: const jsdom = require('@tbranyen/jsdom');
  const {JSDOM} = jsdom;
  const minify = require('../utils/minify.js');
  const slugify = require('slugify');
  const getSize = require('image-size');
  
  module.exports = function(value, outputPath) {
    if (outputPath.endsWith('.html')) {
      const DOM = new JSDOM(value, {
        resources: 'usable'
      });
  
      const document = DOM.window.document;
      const articleImages = [...document.querySelectorAll('main article img, main .intro img')];
      const articleHeadings = [
        ...document.querySelectorAll('main article h2, main article h3')
      ];
      const articleEmbeds = [...document.querySelectorAll('main article iframe')];
  
      if (articleImages.length) {
        articleImages.forEach(image => {
          image.setAttribute('loading', 'lazy');
  
          let file = image.getAttribute('src');
          if ( file.indexOf('http') < 0 )
          {
            file = 'src' + file;
            let dimensions = getSize( file );
            image.setAttribute('width', dimensions.width);
            image.setAttribute('height', dimensions.height);;
          }
          
          // If an image has a title it means that the user added a caption
          // so replace the image with a figure containing that image and a caption
          if (image.hasAttribute('title')) {
            const figure = document.createElement('figure');
            const figCaption = document.createElement('figcaption');
  
            figCaption.innerHTML = image.getAttribute('title');
  
            image.removeAttribute('title');
  
            figure.appendChild(image.cloneNode(true));
            figure.appendChild(figCaption);
  
            image.replaceWith(figure);
          }
        });
      }
  
      if (articleHeadings.length) {
        // Loop each heading and add a little anchor and an ID to each one
        articleHeadings.forEach(heading => {
          const headingSlug = slugify(heading.textContent.toLowerCase());
          const anchor = document.createElement('a');
  
          anchor.setAttribute('href', `#heading-${headingSlug}`);
          anchor.classList.add('heading-permalink');
          anchor.innerHTML = minify(`
          <span class="visually-hidden"> permalink</span>
          <svg fill="currentColor" aria-hidden="true" focusable="false" width="1em" height="1em" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24">
            <path d="M9.199 13.599a5.99 5.99 0 0 0 3.949 2.345 5.987 5.987 0 0 0 5.105-1.702l2.995-2.994a5.992 5.992 0 0 0 1.695-4.285 5.976 5.976 0 0 0-1.831-4.211 5.99 5.99 0 0 0-6.431-1.242 6.003 6.003 0 0 0-1.905 1.24l-1.731 1.721a.999.999 0 1 0 1.41 1.418l1.709-1.699a3.985 3.985 0 0 1 2.761-1.123 3.975 3.975 0 0 1 2.799 1.122 3.997 3.997 0 0 1 .111 5.644l-3.005 3.006a3.982 3.982 0 0 1-3.395 1.126 3.987 3.987 0 0 1-2.632-1.563A1 1 0 0 0 9.201 13.6zm5.602-3.198a5.99 5.99 0 0 0-3.949-2.345 5.987 5.987 0 0 0-5.105 1.702l-2.995 2.994a5.992 5.992 0 0 0-1.695 4.285 5.976 5.976 0 0 0 1.831 4.211 5.99 5.99 0 0 0 6.431 1.242 6.003 6.003 0 0 0 1.905-1.24l1.723-1.723a.999.999 0 1 0-1.414-1.414L9.836 19.81a3.985 3.985 0 0 1-2.761 1.123 3.975 3.975 0 0 1-2.799-1.122 3.997 3.997 0 0 1-.111-5.644l3.005-3.006a3.982 3.982 0 0 1 3.395-1.126 3.987 3.987 0 0 1 2.632 1.563 1 1 0 0 0 1.602-1.198z"/>
          </svg>`);
  
          heading.setAttribute('id', `heading-${headingSlug}`);
          heading.appendChild(anchor);
        });
      }
  
      // Look for videos are wrap them in a container element
      if (articleEmbeds.length) {
        articleEmbeds.forEach(embed => {
          if (embed.hasAttribute('allowfullscreen')) {
            const player = document.createElement('div');
  
            player.classList.add('video-player');
  
            player.appendChild(embed.cloneNode(true));
  
            embed.replaceWith(player);
          }
        });
      }
  
      return '<!DOCTYPE html>\r\n' + document.documentElement.outerHTML;
    }
    return value;
  };
  